An important objection to political liberalism is that it provides no means by which to decide conflicts between public and non-public reasons. This article develops John Rawls' idea of `reasoning from conjecture' as one way to argue for a commitment to public reason. Reasoning from conjecture is a form of non-public justification that allows political liberals to reason from within the comprehensive views of at least some unreasonable citizens. After laying out the basic (...) features of this form of non-public justification, this article responds to three objections based on concerns about insincerity, cultural imperialism, and the epistemic authority of those who reason from conjecture. (shrink)

The two principal models of design in methodological circles in architecture—analysis/synthesis and conjecture/analysis—have their roots in philosophy of science, in different conceptions of scientific method. This paper explores the philosophical origins of these models and the reasons for rejecting analysis/synthesis in favour of conjecture/analysis, the latter being derived from Karl Popper’s view of scientific method. I discuss a fundamental problem with Popper’s view, however, and indicate a framework for conjecture/analysis to avoid this problem.

What I call theoretical abduction (sentential and model-based) certainly illustrates much of what is important in abductive reasoning, especially the objective of selecting and creating a set of hypotheses that are able to dispense good (preferred) explanations of data, but fails to account for many cases of explanations occurring in science or in everyday reasoning when the exploitation of the environment is crucial. The concept of manipulative abduction is devoted to capture the role of action in many interesting (...) situations: action provides otherwise unavailable information that enables the agent to solve problems by starting and performing a suitable abductive process of generation or selection of hypotheses. Many external things, usually inert from the epistemological point of view, can be transformed into what I call epistemic mediators, which are illustrated in the last part of the paper, together with an analysis of the related notion of external representation . Finally, some examples of computational programs that simulate geometrical reasoning are illustrated. The computational embodiment generates a kind of squared epistemic mediator: geometrical construction, as an example of epistemic mediator, is further mediated. (shrink)

As Kant claimed in the Groundwork, and as the idea has been developed by Korsgaard 1997, Bratman 1987, and Broome 2002. This formulation is agnostic on whether reasons for ends derive from our desiring those ends, or from the relation of those ends to things of independent value. However, desire-based theorists may deny, against Hubin 1999, that their theory is a combination of a principle of instrumental transmission and the principle that reasons for ends are provided by desires. (...) Instead, they may say, there is just one principle, a principle of, if you will, instrumental transmutation: if one desires the end, then one has reason to take the means. See the discussion of General Production, in section 8, for a doubt about this. (shrink)

The way in which knowledge progresses, and especially our scientific knowledge, is by unjustified anticipations, by guesses, by tentative solutions to our problems, by conjectures. These conjectures are controlled by criticism: that is, by attempted refutations, which include severely critical tests. They may survive these tests; but they can never be positively justified: they can neither be established as certainly true nor even as 'probable'. Criticism of our conjectures is of decisive importance: by bringing out our mistakes it makes us (...) understand the difficulties of the problems which we try to solve. This is how we become better acquainted with our problem, and able to propose more mature solutions: the very refutation of a theory - that is, of a tentative solution to our problem - is always a step forward that takes us nearer the truth. And this is how we can learn from our mistakes. As we learn from our mistakes our knowledge grows, even though we may never know - that is, know for certain. Since our knowledge can grow, there can be no reason here for despair of reason. And since we can never know for certain, the can be no authority here for any claim to authority, for conceit over our knowledge, or for smugness. The essays and lectures of which this book is composed apply this thesis to many topics, ranging from problems of the philosophy and history of the physical and social sciences to historical and political problems. (shrink)

: Faraday is often described as an experimentalist, but his work is a dialectical interplay of concrete objects, visual images, abstract, theoretically-informed visual models and metaphysical precepts. From phenomena described in terms of patterns formed by lines of force he created a general explanation of space-filling systems of force which obey both empirical laws and principles of conservation and economy. I argue that Faraday's articulation of situated experience via visual models into a theory capable of verbal expression owed much (...) to his strategy of moving—via conjectural visual models—between the phenomenology of particulars (often displayed as patterns) and the general features of dynamical phenomena which he depicted as structures. (shrink)

While Kant’s account of humankind’s rational progress has been widely discussed, his views about the way in which this progress might have begun and the circumstances surrounding this beginning have been largely neglected. Implicit in such an omission is the assumption that Kant does not say much about the very beginning of human history or that whatever he says is of little philosophical value. This paper challenges these assumptions. I reconstruct Kant’s account of the emergence of reason by looking at (...) his various conjectural and more literal remarks about our species’ transition from mere irrational animals into primitive human beings possessing a rudimentary form of rationality. Next, I show how this account fits with Kant’s broader view of humankind’s rational progress and its subsequent stages. By doing so, I elucidate Kant’s guidelines for achieving this progress in the future by unifying them with his regulative view of reason’s past. (shrink)

We offer a model of moral reform and regeneration that involves a wrong-doer making two movements: on the one hand, he identifies with himself as the one who did the act, while he also intentionally moves away from that self (or set of desires and intentions) and moves toward a transformed identity. We see this model at work in the formal practice of contrition and reform in Christian and Buddhist rites. This paper is part of a broader project we (...) are undertaking on the philosophy of forgiveness. (shrink)

Philosophy & Social Criticism, Volume 48, Issue 9, Page 1226-1246, November 2022. In this study, we claim that political liberalism, despite harsh criticism, is still the best option available for providing a just and stable society. However, we maintain that political liberalism needs to be revised so as to be justifiable from the perspective of not only the “reasonable” in a Rawlsian sense but also the ones whom Rawls labels as “unreasonable.” To support our claim, going beyond Rawls’s original (...) account, we unpack the concept of unreasonableness and identify three different subsets that we label as the “partially reasonable,” the “non-reasonable,” and the “unreasonable.” We argue that both the “fully” reasonable and the “partially reasonable” would be included into the constituency of public justification; more specifically, we claim that the latter would support liberal institutions out of their reasons: we define these reasons as mutually intelligible reasons and claim that they allow to acknowledge the importance of a convergence approach to public justification. As for the “non-reasonable” and “unreasonable,” we claim that they cannot be included in the constituency of public justification, but they nonetheless could be compliant with liberal institutions if political liberalism offers them some reasons to comply: here, we claim that political liberalism should include them through engagement and propose reasoning from conjecture as an effecting way of offering reasons for compliance. In particular, we claim that through reasoning from conjecture, the “non-reasonable” could find conciliatory reasons to comply with liberal institutions on a stable base. With regard to the “unreasonable” in the strict sense, we claim that through reasoning from conjecture, their unreasonableness could be contained and they could find reasons—even if just self-interested—for complying with liberal institutions rather than defying them. In our discussion, we consider the different subsets not as “frozen” but as dynamic and open to change, and we aim to propose a more complex and multilayered approach to inclusion that would be able to include a wider set of people. To strengthen our argument, we show that the need for a wider public justification and for broader inclusion in liberal societies is grounded in respect for persons both as equal persons and as particular individuals. In particular, we claim that individuals’ values, ends, commitments, and affiliations activate demands of respect and can strengthen the commitment to the liberal–democratic order. Through a reformulation of the role of respect in liberal societies, we also show a kind of social and communitarian dimension that, we claim, is fully compatible with political liberalism and opens it up to “civic friendship” and “social solidarity,” which are constitutive elements for the development of a sense of justice and for the realization of a just and stable society. (shrink)

Conscious macrostates are usually assumed to be emergent from the underlying physical microstates comprising the brain and nervous system of biological organisms. However, a major problem with this assumption is that consciousness is essentially nonmeasurable unlike all other proven emergent properties of physical systems. In an earlier paper, using a no-go theorem, it was shown that conscious states cannot be comprised of processes that are physical in nature (Reason, 2019). Combining this result with another unrelated work on causal emergence (...) in physical systems (Hoel, Albantakis and Tononi, 2013), we show in this paper that conscious macrostates are not emergent from physical systems and they also do not supervene on physical microstates. An important implication of our work is that there must be some form of violation of energy conservation in biological systems that are conscious. (shrink)

Philosophy & Social Criticism, Volume 48, Issue 9, Page 1226-1246, November 2022. In this study, we claim that political liberalism, despite harsh criticism, is still the best option available for providing a just and stable society. However, we maintain that political liberalism needs to be revised so as to be justifiable from the perspective of not only the “reasonable” in a Rawlsian sense but also the ones whom Rawls labels as “unreasonable.” To support our claim, going beyond Rawls’s original (...) account, we unpack the concept of unreasonableness and identify three different subsets that we label as the “partially reasonable,” the “non-reasonable,” and the “unreasonable.” We argue that both the “fully” reasonable and the “partially reasonable” would be included into the constituency of public justification; more specifically, we claim that the latter would support liberal institutions out of their reasons: we define these reasons as mutually intelligible reasons and claim that they allow to acknowledge the importance of a convergence approach to public justification. As for the “non-reasonable” and “unreasonable,” we claim that they cannot be included in the constituency of public justification, but they nonetheless could be compliant with liberal institutions if political liberalism offers them some reasons to comply: here, we claim that political liberalism should include them through engagement and propose reasoning from conjecture as an effecting way of offering reasons for compliance. In particular, we claim that through reasoning from conjecture, the “non-reasonable” could find conciliatory reasons to comply with liberal institutions on a stable base. With regard to the “unreasonable” in the strict sense, we claim that through reasoning from conjecture, their unreasonableness could be contained and they could find reasons—even if just self-interested—for complying with liberal institutions rather than defying them. In our discussion, we consider the different subsets not as “frozen” but as dynamic and open to change, and we aim to propose a more complex and multilayered approach to inclusion that would be able to include a wider set of people. To strengthen our argument, we show that the need for a wider public justification and for broader inclusion in liberal societies is grounded in respect for persons both as equal persons and as particular individuals. In particular, we claim that individuals’ values, ends, commitments, and affiliations activate demands of respect and can strengthen the commitment to the liberal–democratic order. Through a reformulation of the role of respect in liberal societies, we also show a kind of social and communitarian dimension that, we claim, is fully compatible with political liberalism and opens it up to “civic friendship” and “social solidarity,” which are constitutive elements for the development of a sense of justice and for the realization of a just and stable society. (shrink)

Originally proposed by John Rawls, the idea of reasoning from conjecture is popular among the proponents of political liberalism in normative political theory. Reasoning from conjecture consists in discussing with fellow citizens who are attracted to illiberal and antidemocratic ideas by focusing on their religious or otherwise comprehensive doctrines, attempting to convince them that such doctrines actually call for loyalty to liberal democracy. Our goal is to criticise reasoning from conjecture as (...) a tool aimed at persuasion and, in turn, at improving the stability of liberal democratic institutions. To pursue this goal, we use as case study real-world efforts to counter-radicalise at-risk Muslim citizens, which, at first glance, reasoning from conjecture seems well-placed to contribute to. This case study helps us to argue that the supporters of reasoning from conjecture over-intellectualise opposition to liberal democracy and what societies can do to counter it. Specifically, they (i) underestimate how few members of society can effectively perform reasoning from conjecture; (ii) overlook that the burdens of judgement, a key notion for political liberals, highlight how dim the prospects of reasoning from conjecture are and (iii) do not pay attention to the causes of religious persons’ opposition to liberal democracy. However, not everything is lost for political liberals, provided that they redirect attention to different and under-researched resources contained in Rawls’s theory. In closing, we briefly explain how such resources are much better placed than reasoning from conjecture to provide guidance relative to counter-radicalisation in societies (i) populated by persons who do not generally hold anything close to a fully worked out and internally consistent comprehensive doctrine and (ii) where political institutions should take responsibility for at least part of the existing alienation from liberal democratic values. (shrink)

It is a popular view thatpractical deliberation excludes foreknowledge of one's choice. Wolfgang Spohn and Isaac Levi have argued that not even a purely probabilistic self-predictionis available to thedeliberator, if one takes subjective probabilities to be conceptually linked to betting rates. It makes no sense to have a betting rate for an option, for one's willingness to bet on the option depends on the net gain from the bet, in combination with the option's antecedent utility, rather than on the (...) offered odds. And even apart from this consideration, assigning probabilities to the options among which one is choosing is futile since such probabilities could be of no possible use in choice. The paper subjects these arguments to critical examination and suggests that, appearances notwithstanding, practical deliberation need not crowd outself-prediction. (shrink)

Computational philosophy (CP) aims at investigating many important concepts and problems of the philosophical and epistemological tradition in a new way by taking advantage of information-theoretic, cognitive, and artificial intelligence methodologies. I maintain that the results of computational philosophy meet the classical requirements of some Peircian pragmatic ambitions. Indeed, more than a 100 years ago, the American philosopher C.S. Peirce, when working on logical and philosophical problems, suggested the concept of pragmatism(pragmaticism, in his own words) as a logical criterion to (...) analyze what words and concepts express through their practical meaning. Many words have been spent on creative processes and reasoning, especially in the case of scientific practices. In fact, many philosophers have usually offered a number of ways of construing hypotheses generation, but they aim at demonstrating that the activity of generating hypotheses is paradoxical, obscure, and thus not analyzable. Those descriptions are often so far from Peircian pragmatic prescription and so abstract to result completely unknowable and obscure. To dismiss this tendency and gain interesting insight about the so-called logic of scientific discovery we need to build constructive procedures, which could play a role in moving the problem-solving process forward by implementing them in some actual models. The computational turn gives us a new way to understand creative processes in a strictly pragmatic sense. In fact, by exploiting artificial intelligence and cognitive science tools, computational philosophy allows us to test concepts and ideas previously conceived only in abstract terms. It is in the perspective of these actual computational models that I find the central role of abduction in the explanation of creative reasoning in science. I maintain that the computational philosophy analysis of model-based and manipulative abduction and of external and epistemic mediators is important not only to delineate the actual practice of abduction, but also to further enhance the development of programs computationally adequate in rediscovering, or discovering for the first time, for example, scientific hypotheses or mathematical theorems. The last part of the paper is devoted to illustrating the problem of the extra-theoretical dimension of reasoning and discovery from the perspective of some mathematical cases derived from calculus and geometry. (shrink)

Joel Feinberg : In Memoriam. Preface. Part I: INTRODUCTION TO THE NATURE AND VALUE OF PHILOSOPHY. 1. Joel Feinberg: A Logic Lesson. 2. Plato: "Apology." 3. Bertrand Russell: The Value of Philosophy. PART II: REASON AND RELIGIOUS BELIEF. 1. The Existence and Nature of God. 1.1 Anselm of Canterbury: The Ontological Argument, from Proslogion. 1.2 Gaunilo of Marmoutiers: On Behalf of the Fool. 1.3 L. Rowe: The Ontological Argument. 1.4 Saint Thomas Aquinas: The Five Ways, from Summa Theologica. (...) 1.5 Samuel Clarke: A Modern Formulation of the Cosmological Argument. 1.6 William L. Rowe: The Cosmological Argument. 1.7 William Paley: The Argument from Design. 1.8 Michael Ruse: The Design Argument. 1.9 David Hume: Dialogues Concerning Natural Religion. 2. The Problem of Evil. 2.1 Fyodor Dostoyevsky: Rebellion. 2.2 J. L. Mackie: Evil and Omnipotence. 2.3 Peter van Inwagen: The Argument from Evil. 2.4 Michael Murray and Michael Rea: The Argument from Evil. 2.5 B. C. Johnson: God and the Problem of Evil. 3. Reason and Faith. 3.1 W. K. Clifford: The Ethics of Belief. 3.2 William James: The Will to Believe. 3.3 Kelly James Clark: Without Evidence or Argument. 3.4 Blaise Pascal: The Wager. 3.5 Lawrence Shapiro: Miracles and Justification. 3.6 Simon Blackburn: Infini-Rien. Part III. HUMAN KNOWLEDGE: ITS GROUNDS AND LIMITS. 1. Skepticism. 1.1 John Pollock: A Brain in a Vat. 1.2 Michael Huemer: Three Skeptical Arguments. 1.3 Robert Audi: Skepticism. 2. The Nature and Value of Knowledge. 2.1 Plato: Knowledge as Justified True Belief. 2.2 Edmund Gettier: Is Justified True Belief Knowledge? 2.3 James Cornman, Keith Lehrer, and George Pappas: An Analysis of Knowledge. 2.4 Gilbert Ryle: Knowing How and Knowing That. 2.5 Plato: "Meno". 2.6 Linda Zagzebski, Epistemic Good and The Good Life. 3. Our Knowledge of the External World. 3.1 Bertrand Russell: Appearance and Reality and the Existence of Matter. 3.2 René Descartes: Meditations on First Philosophy. 3.3 John Locke: The Causal Theory of Perception. 3.4 George Berkeley: Of the Principles of Human Knowledge. 3.5 G. E. Moore: Proof of an External World. 4. The Methods of Science. 4.1 David Hume: An Inquiry Concerning Human Understanding. 4.2 Wesley C. Salmon: An Encounter with David Hume. 4.3 Karl Popper: Science: Conjectures and Refutations. 4.4 Philip Kitcher: Believing Where We Cannot Prove. Part IV: MIND AND ITS PLACE IN NATURE. 1. The Mind-Body Problem. 1.1 Brie Gertler: In Defense of Mind--Body Dualism. 1.2 Frank Jackson: The Qualia Problem. 1.3 David Papineau: The Case for Materialism. 1.4 Paul Churchland: Functionalism and Eliminative Materialism. 2. Can Non-Humans Think? 2.1 Alan Turing: Computing Machinery and Intelligence. 2.2 John R. Searle: Minds, Brains, and Programs. 2.3 William G. Lycan: Robots and Minds. 3. Personal Identity and the Survival of Death. 3.1 John Locke: The Prince and the Cobbler. 3.2 Thomas Reid: Of Mr. Locke’s Account of Our Personal Identity. 3.3 David Hume: The Self. 3.4 Derek Parfit: Divided Minds and the Nature of Persons. 3.5 Shelly Kagan: What Matters. 3.6 John Perry: A Dialogue on Personal Identity and Immortality. Part V: DETERMINISM, FREE WILL, AND RESPONSIBILITY. 1. Libertarianism: The Case for Free Will and Its Incompatibility with Determinism. 1.1 Roderick M. Chisholm: Human Freedom and the Self. 1.2 Robert Kane: Free Will: Ancient Dispute, New Themes. 2. Hard Determinism: The Case for Determinism and its Incompatibility with Its Incompatibility with Any Important Sense of Free Will. 2.1 James Rachels: The case against Free Will. 2.2 Derk Pereboom: Why We Have No Free Will and Can Live Without It. 3. Compatibilism: The Case for Determinism and Its Compatibility with the Most Important Sense of Free Will. 3.1 David Hume: Of Liberty and Necessity. 3.2 Helen Beebee: Compatibilism and the Ability to do Otherwise. 4. Freedom and Moral Responsibility. 4.1 Galen Strawson: Luck Swallows Everything. 4.2 Harry Frankfurt: Alternate Possibilities and Moral Responsibility. 4.3 Thomas Nagel: Moral Luck. 4.4 Susan Wolf: Sanity and the Metaphysics of Responsibility. Part VI: MORALITY AND ITS CRITICS. 1. Changes to Morality. 1.1 Joel Feinberg: Psychological Egoism. 1.2 Plato: The Immoralist’s Challenge. 1.3 Friedrich Nietzche: Master and Slave Morality. 1.4 Richard Joyce: The Evolutionary Debunking of Morality. 2. Proposed Standards and Right of Conduct. 2.1 Russ Shafer-Landau: Ethical Subjectivism. 2.2 Mary Midgley: Trying Out One’s New Sword. 2.3 Aristotle: Virtue and the Good Life. 2.4 Thomas Hobbes: Leviathan. 2.5 Plato: Euthyphro. 2.6 Immanuel Kant: The Good Will and the Categorical Imperative. 2.7 J.S. Mill: Utilitarianism, Chapters 2 and 4. 2.8 W. D. Ross: What Makes Right Acts Right? 2.9 Hilde Lindemann: What Is Feminist Ethics? 3. Ethical Problems. 3.1 Kwame Anthony Appiah: What Will Future Generations Condemn Us For? 3.2 Peter Singer: Famine, Affluence and Morality. 3.3 John Harris: The Survival Lottery. 3.4 James Rachels: Active and Passive Euthanasia. 3.5 Mary Anne Warren: The Moral and Legal Status of Abortion. 3.6 Don Marquis: Why Abortion Is Immoral. 4. The Meaning of Life. 4.1 Epicurus: Letter to Menoeceus. 4.2 Richard Taylor: The Meaning of Life. 4.3 Richard Kraut: Desire and the Human Good. 4.4 Leo Tolstoy: My Confession. 4.5 Susan Wolf: Happiness and Meaning. 4.6 Thomas Nagel: The Absurd. (shrink)

Dylan Thomas made his name with one particular poem, ‘The Force that Through the Green Fuse Drives the Flower’, which he wrote and published in his teens. Not only the theme but also the imagery in detail is too close to certain passages in Schopenhauer for a coincidence to be likely. It is more probable that there was some influence. This is made more likely by the fact that there are good reasons to believe that the young Thomas had read (...) a book called Thomas Hardy's Universe, by Ernest Brennecke, which contains many quotations from Schopenhauer, including, in its first chapter, the one closest to Thomas's poem. (shrink)

There is a prevailing opinion that conjectural knowledge (zann) cannot be taken as a basis in determining the fundamental theological principles among the theologians. However, from which sources and how to obtain certainty (yaqīn) and which types of knowledge are definitive (qat‘ī) have been discussed extensively. Certain and conjectural knowledge meet at a common point in terms of relying on evidence. Conjectural knowledge obtained via reasoning and/or religious scripture that do not express certainty. While conjectural knowledge has been (...) essentially related to the concepts of estimation, doubt, belief and knowledge, by its in term of value, it is stands closer to the concepts of knowledge and belief. Conjectural knowledge contains different degrees of certainty. When it is chosen to be more certain, it is considered as a valid conjecture, when it is disregarded, it is considered as erroneous conjecture. If there is no choice for its certainty, then it is called doubt (shakk). If the information/judgment obtained through reasoning becomes fixed, unchangeable and in a coherence that does not allow it to be otherwise, then it is called definitive (qat‘ī) knowledge. To achieve that, theologians generally used methods of argumentations like syllogism, induction, exhaustive investigation and disjunction (al-sabr wa’l-taqsīm) to provide such knowledge about divinity and prophethood. Theologians have used conjectural knowledge, which are based on endoxic (mashhūrāt), already granted (musallamāt) and acceptance of authority (maqbūlāt), in their dialectics to persuade their discussants, rather than to justify the fundamental theological issues of religion. While theologians mostly use rational proofs in theological issues, they also gave significant place to the scriptural narrative that determines the creed. In this context, theologians accepted the narrated evidence as binding and decisive, as long as it is certain in terms of both authenticity and implication. Ultimately, the fundamental theological principles of religion are based on these narrative evidences. Although the theologians do not accept single reports (khabar al-wahid) for their questionable authenticity, they also made inferences regarding subjects of traditions (sam‘iyyāt). Acting from this perspective, theologians tried to justify with narrative evidence rather than rational arguments on these issues such as torment in grave, intercession (shafā‘ah) and sirât, which are mostly matters of eschatology and the unseen (ghayb). Finally, it has been concluded that the conjectural knowledge is still valid in some secondary theological issues and the assumption that the conjectural knowledge has no deduction value in theology is not absolute. (shrink)

Samuel Scheffler postulates that we derive more value and meaning from our lives because we have confidence in the indefinite continuation of humanity than we do from our own or our loved ones’ continued existence. Scheffler believes that this shows humans to be less egocentric than some believe. He offers two thought experiments to motivate this intuition. The first thought experiment depends on the second to control for certain intuitions that run counter to the intuitions Scheffler wants to (...) elicit. So, Scheffler is committed to using both thought experiments. The second of the two, and the one on which the first depends, is a scenario in which people become infertile and humanity dies out over the course of a single generation. I argue that this scenario can be more reasonably taken to show that value and meaning in life does not depend on a collective afterlife. I argue that the particulars we value in such a scenario from both a normative and descriptive perspective may change, but that a robust notion of value, and consequently meaning, can exist despite the knowledge that humanity will not continue indefinitely into the future. I also address the reason we might find the slow extinction of humanity unsettling for reasons unrelated to the loss of a collective afterlife. I conclude by presenting a thought experiment challenging the idea that the afterlife conjecture deals any substantial blow to the supposed extent of human egocentrism. (shrink)

The ‘consensus’ model of public reason, associated with John Rawls’s political liberalism, has been criticised for excluding certain reasons from receiving consideration where the justification of the constitutional essentials is concerned. One limitation of these criticisms is that they typically focus on the exclusion of reasons political liberals are committed to excluding, notably reasons based on religious and comprehensive views. I argue that public reason excludes some reasons, central to the interests of many oppressed groups, that public reason advocates (...) will agree should not be excluded.L’idée de raison publique comme «consensus», associée au libéralisme politique de John Rawls, a été attaquée du fait de sa supposée incapacité à permettre la prise en compte de certaines raisons dans les cas où la substance même de la constitution est en question. Une limitation de ces critiques est qu’elles se concentrent habituellement sur l’exclusion de ces raisons que les libéraux eux-mêmes s’efforcent d’exclure, en particulier des raisons fondées sur des vues globales ou religieuses. Je défends l’idée selon laquelle la raison publique exclut de fait certaines raisons, essentielles aux intérêts de nombreux groupes opprimés, que les tenants de la raison publique eux-mêmes considèreraient ne pas devoir être exclues. (shrink)

Mathematicians often speak of conjectures, yet unproved, as probable or well-confirmed by evidence. The Riemann Hypothesis, for example, is widely believed to be almost certainly true. There seems no initial reason to distinguish such probability from the same notion in empirical science. Yet it is hard to see how there could be probabilistic relations between the necessary truths of pure mathematics. The existence of such logical relations, short of certainty, is defended using the theory of logical probability (or objective (...) Bayesianism or non-deductive logic), and some detailed examples of its use in mathematics surveyed. Examples of inductive reasoning in experimental mathematics are given and it is argued that the problem of induction is best appreciated in the mathematical case. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Journal of the History of Philosophy 42.2 (2004) 220-221 [Access article in PDF] Clyde Lee Miller. Reading Cusanus: Metaphor and Dialectic in a Conjectural Universe. Washington, D.C.: Catholic University of America Press, 2003. Pp. viii + 276. Cloth, $64.95. In an age where the idea of postmodernity gains more and more ground, the period of postmodern thinking has turned into a major challenge to the human mind. Whereas the (...) project of modernity revokes itself through the contradictions it has generated, the need to find new perspectives makes us wonder what happened in the 15th century when the Renaissance paved the way to modernity and still contained seeds of alternative developments which for one reason or another did not get a chance to germinate. This is an invitation to concentrate on the work of Nicholas of Cusa (1401-1464) as one of the major Renaissance thinkers.Miller's book is an attempt to promote the understanding of Cusanus by a close reading of six of the major works of this author. In reading these works he focuses on Cusan thought both as this thought presents itself in these works, and as it appears against the background of traditional philosophy, especially when seen in the light of the Neoplatonic tradition.The works in question are the books On Learned Ignorance (De docta ignorantia) and On Conjectures (De coniecturis), aptly presented under the title: "Envisiong the Whole," and "Conjecturing Oneness and Otherness" respectively. The remaining four works concern the The Layman: About Mind (Idiota de mente) in which Cusanus develops his understanding of the mind and of intellectual authenticity; The Vision of God (De visione Dei), a treatise on mystical theology and an invitation to enter the divine mystery through a combination of prayer and reflection; On the Not Other (De non aliud), a highly speculative work on divine immanence and transcendence; and The Hunt for Wisdom (De venatione sapientiae) in which Cusanus gives an account of his philosophy by connecting it with the metaphor of a hunt in ten different fields. [End Page 220]Miller begins his book with an Introduction in which he outlines his approach to Cusanus, taking the cue from Plato's image of the divided line with its emphasis on the dialectical distinction between noesis (intellect) and dianoia (reason), and from the dialogue On the Hidden God (De Deo abscondito), a brief discussion between a Heathen and a Christian in which Cusanus connects the theme of learned ignorance with the act of adoration. The distinction between reason and intellect is important because the work of Cusanus is a continuous effort to cope with the meaning of distinctions and their impact on our ways of thinking. The reference to the dialogue is significant because this text clearly indicates that the quest for God is the central issue in the thought of Cusanus, and that the notion of ignorance is actually connected with the theoretical and practical meaning of God.In his discussion of the six works Miller follows the text of Cusanus which he presents in the form of argumentative summaries and complementary reflections. His presentation is lucid and to the point. In his reflections on the text and context of Cusan thought he gives valuable insights into the historical position of Cusanus and the manner in which Nicholas appropriated and transformed traditional ways of thinking. At the same time Miller keeps track of the reception of Cusanus by contemporary scholarship and the various interpretations it has to offer.The book ends with a "reprise" of the previous chapters which provides "an overall perspective on Nicholas' thought and its main themes and proposals" (241). The central elements of this perspective are "the metaphysics of the Infinite and the finite" (242) and the doctrine of perspectival relations as it has been developed in De coniecturis. What connects them with one another finds expression in the distinction (and transition) between explanatory and exploratory metaphors (252); that is, between metaphors such as "image-exemplar" and "unfolding-enfolding," which provide explanatory structures for the interpretation of reality, and metaphors such... (shrink)

Recent public hearings on misconduct charges belie the conjecture that due process will perforce defeat informed scientific reasoning. One notable case that reviewed an obtuse description of experimental methods displays some of the subtleties of differentiating carelessness from intent to deceive. There the decision of a studious nonscientist panel managed to reach sensible conclusions despite conflicting expert testimony. The significance of such a result may be to suggest that to curtail due process would be both objectionable and (...) unproductive. (shrink)

We treat the problem of reasoning with ambiguous propositions. Even though ambiguity is obviously problematic for reasoning, it is no less obvious that ambiguous propositions entail other propositions, and are entailed by other propositions. This article gives a formal analysis of the underlying mechanisms, both from an algebraic and a logical point of view. The main result can be summarized as follows: sound reasoning with ambiguity requires a distinction between equivalence on the one and congruence on (...) the other side: the fact that \ entails \ does not imply \ can be substituted for \ in all contexts preserving truth. Without this distinction, we will always run into paradoxical results. We present the sequent calculus \, which we conjecture implements sound and complete propositional reasoning with ambiguity, and provide it with a language-theoretic semantics, where letters represent unambiguous meanings and concatenation represents ambiguity. (shrink)

A naturalistic theory of modal intuitions and modal reasoning inspired by Hintikka's theorizing should start from the principle that advanced modal reasoning has its roots in commonsense intuitions. It is proposed that the naturalist can rely on the assumption of uniformity: the same set of basic principles is used in reasoning about actual and counterfactual dependencies - modal cognition is conservative. In the most primitive cases the difference between a model of an actual situation and of (...) a merely possible one lies in its functional and indicational roles, not in its internal make-up. This conjecture enables one to derive important aspects of modal reasoning from the non-modal one. In the final section of the paper a simplified account of such derivation is proposed, drawn partly from connection- ist literature. (shrink)

A naturalistic theory of modal intuitions and modal reasoning inspired by Hintikka's theorizing should start from the principle that advanced modal reasoning has its roots in commonsense intuitions. It is proposed that the naturalist can rely on the assumption of uniformity: the same set of basic principles is used in reasoning about actual and counterfactual dependencies - modal cognition is conservative. In the most primitive cases the difference between a model of an actual situation and of (...) a merely possible one lies in its functional and indicational roles, not in its internal make-up. This conjecture enables one to derive important aspects of modal reasoning from the non-modal one. In the final section of the paper a simplified account of such derivation is proposed, drawn partly from connection- ist literature. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Journal of the History of Philosophy 42.2 (2004) 220-221 [Access article in PDF] Clyde Lee Miller. Reading Cusanus: Metaphor and Dialectic in a Conjectural Universe. Washington, D.C.: Catholic University of America Press, 2003. Pp. viii + 276. Cloth, $64.95. In an age where the idea of postmodernity gains more and more ground, the period of postmodern thinking has turned into a major challenge to the human mind. Whereas the (...) project of modernity revokes itself through the contradictions it has generated, the need to find new perspectives makes us wonder what happened in the 15th century when the Renaissance paved the way to modernity and still contained seeds of alternative developments which for one reason or another did not get a chance to germinate. This is an invitation to concentrate on the work of Nicholas of Cusa (1401-1464) as one of the major Renaissance thinkers.Miller's book is an attempt to promote the understanding of Cusanus by a close reading of six of the major works of this author. In reading these works he focuses on Cusan thought both as this thought presents itself in these works, and as it appears against the background of traditional philosophy, especially when seen in the light of the Neoplatonic tradition.The works in question are the books On Learned Ignorance (De docta ignorantia) and On Conjectures (De coniecturis), aptly presented under the title: "Envisiong the Whole," and "Conjecturing Oneness and Otherness" respectively. The remaining four works concern the The Layman: About Mind (Idiota de mente) in which Cusanus develops his understanding of the mind and of intellectual authenticity; The Vision of God (De visione Dei), a treatise on mystical theology and an invitation to enter the divine mystery through a combination of prayer and reflection; On the Not Other (De non aliud), a highly speculative work on divine immanence and transcendence; and The Hunt for Wisdom (De venatione sapientiae) in which Cusanus gives an account of his philosophy by connecting it with the metaphor of a hunt in ten different fields. [End Page 220]Miller begins his book with an Introduction in which he outlines his approach to Cusanus, taking the cue from Plato's image of the divided line with its emphasis on the dialectical distinction between noesis (intellect) and dianoia (reason), and from the dialogue On the Hidden God (De Deo abscondito), a brief discussion between a Heathen and a Christian in which Cusanus connects the theme of learned ignorance with the act of adoration. The distinction between reason and intellect is important because the work of Cusanus is a continuous effort to cope with the meaning of distinctions and their impact on our ways of thinking. The reference to the dialogue is significant because this text clearly indicates that the quest for God is the central issue in the thought of Cusanus, and that the notion of ignorance is actually connected with the theoretical and practical meaning of God.In his discussion of the six works Miller follows the text of Cusanus which he presents in the form of argumentative summaries and complementary reflections. His presentation is lucid and to the point. In his reflections on the text and context of Cusan thought he gives valuable insights into the historical position of Cusanus and the manner in which Nicholas appropriated and transformed traditional ways of thinking. At the same time Miller keeps track of the reception of Cusanus by contemporary scholarship and the various interpretations it has to offer.The book ends with a "reprise" of the previous chapters which provides "an overall perspective on Nicholas' thought and its main themes and proposals" (241). The central elements of this perspective are "the metaphysics of the Infinite and the finite" (242) and the doctrine of perspectival relations as it has been developed in De coniecturis. What connects them with one another finds expression in the distinction (and transition) between explanatory and exploratory metaphors (252); that is, between metaphors such as "image-exemplar" and "unfolding-enfolding," which provide explanatory structures for the interpretation of reality, and metaphors such... (shrink)

This short essay aims at discussing the opposition between two different views on limits in legal interpretations: I will call them “no-limits option” and “pro-limits option”. As for, it is based on a widely diffused understanding of individual freedom: that of an unceasing breaking of all limits. This idea involves nowadays not only a number of once accepted moral limits, nor the material or social limits suffered by people, but also the limits of conceptual determinations. As for, it is based (...) on the conjecture that limit would be the condition of “no longer, not yet”—as such, a matter of authentic freedom. The “no-limits option” can easily lead, in legal interpretation, to a radical contextualism according to which there would be unlimited meanings for a syntactically and semantically same legal text. The “pro-limits option”, on the contrary, maintains that the existence of limits is reasonable, and that reasonableness is itself a limit to interpretation. In other words, the undetermined space of “no longer, not yet” in which the limits consist of is open to exploration on and beyond through appropriate procedures of reason-giving. According to the “pro-limits option”, a reasonably common core-meaning of a legal text should be sought also when cases of application vary—and that would be precisely the nature of legal interpretation. Arguments in favor of this thesis can be found in Western philosophy from Aristotle to contemporary neurosciences. A remarkable consequence of my discussion on these two options deals with the concept of normativity, given that option conceives normativity only as an expression of will, whereas option links normativity to reasonableness. (shrink)

In this paper, I propose to look closely at certain crucial aspects of the logic of Rawls' argument in Political Liberalism and related subsequent writings. Rawls' argument builds on the notion of comprehensiveness, whereby a doctrine encompasses the full spectrum of the life of its adherents. In order to show the mutual conflict and irreconcilability of comprehensive doctrines, Rawls needs to emphasise the comprehensiveness of doctrines, as their irreconcilability to a large extent emanates from that comprehensiveness. On the other (...) hand, in order to show the possibility and plausibility of the political liberal solution he needs to emphasise that most of these doctrines are reasonable: i.e., they are willing to cede a portion of their authority to political liberalism for the right reasons. Yet, if they are willing to cede a portion of their authority to a political conception they cannot be as comprehensive as we initially thought they were. All these elements highlight the tension in the argument itself. I suggest that many of these tensions can be removed by making Rawls' account more flexible. In this context I propose certain amendments to Rawls' account, which may overcome some of the tensions mentioned above. (shrink)

This article revisits the controversy between Abū Bakr al-Rāzī and Abū al-Qāsim al-Balḫī. Based on the testimony of the Kitāb taṯbīt dalāʾil al-nubuwwa of the Qāḍī ʿAbd al-Ǧabbār, it is shown that the two philosophers must have clashed at the court of Aḥmad b. Sahl al-Marwazī, governor of Balḫ, during the 910s, and that the virulence of the tone of their exchange can be explained above all by this context of professional rivalry. In terms of content, their conversation must have (...) focused on the question of divine justice and on the best way to give an account of prophecy and Qurʾanic wisdom. We then turn to the study of chap. VIII, 4 of Faḫr al-Dīn al-Rāzī's Al-maṭālib al-ʿāliya and show that, contrary to a recently held view, this chapter constitutes an echo not of Abū Bakr al-Rāzī, but of the first argument of Ibn al-Rāwandī's Kitāb al-zumurrud, which contrasted the autonomy of reason with the necessity of prophecy in order to conclude from the former to the negation of the latter. Finally, it is suggested that Abū Bakr al-Rāzī's doctrine of prophecy, like that of the great theologians of his time, both Muʿtazilites and Ašʿarites, aims to escape the dilemma set up by Ibn al-Rāwandī a few decades earlier. (shrink)

A father brings his six-year-old daughter and her older sister to their pediatrician to be evaluated for a history of cough, runny nose, and low-grade fever. In addition to signs of a cold, the girl's nasal bridge is quite swollen and bruised. When asked how her nose was injured, she shrugs, and her father's only conjecture is that she sleepwalks and might have bumped into something. The father sits impatiently and as questioning progresses becomes increasingly defensive, at one point (...) angrily declaring, “We don't beat our kids, if that's what you’re asking.” Further complicating the situation is information from nurses that this family is “on the brink” socially and financially, and that additional stress is likely “to blow this family apart.” A careful physical exam identifies no other injuries, and a thorough review reveals no evidence of prior suspicious injuries, frequent visits to the emergency room, or bleeding abnormalities. The evidence does not point to abuse as the most likely explanation for the injury, but it clearly is not ruled out. Should one report this family for suspected abuse? Is one required to report? (shrink)

Theoretical and manipulative abduction conjectures and manipulations : the extra-theoretical dimension of scientific discovery. -- Non-explanatory and instrumental abduction : plausibility, implausibility, ignorance preservation. -- Semiotic brains and artificial minds : how brains make up material cognitive systems. -- Neuromultimodal abduction : pre-wired brains, embidiment, neurospaces. -- Animal abduction : from mindless organisms to srtifactual mediators. -- Abduction, affordances, and cognitive niches : sharing representations and creating chances through cognitive niche construction. -- Abduction in human and logical agents : (...) hasty generalizers, hybrid abducers, fallacies. -- Morphodynamical abduction : causation of hypotheses by attractors dynamics. (shrink)

Western philosophy and science are responsible for constructing some powerful tools of investigation, aiming at discovering the truth, delivering robust explanations, verifying conjectures, showing that inferences are sound and demonstrating results conclusively. By contrast reasoning that depends on analogies has often been viewed with suspicion. Professor Lloyd first explores the origins of those Western ideals, criticises some of their excesses and redresses the balance in favour of looser, admittedly non-demonstrative analogical reasoning. For this he takes examples both (...) class='Hi'>from ancient Greek and Chinese thought and from the materials of recent ethnography to show how different ancient and modern cultures have developed different styles of reasoning. He also develops two original but controversial ideas, that of semantic stretch and the multidimensionality of reality. (shrink)

Electronic waste is the fastest growing form of waste worldwide, associated with a range of environmental, health, and justice problems. Unfortunately, disposal and recycling are hindered by a tendency of consumers to resist recycling their e-waste. This backlog of un-discarded e-waste poses significant challenges for the future. This paper addresses the reasons why many people might continue to value their technological artifacts and therefore to hoard them, suggesting that many of these common explanations are deficient in some way. It argues (...) instead for a derivative kind of value, here labelled “system value”. Addressing the problem of hoarding by invoking the idea of system value, the authors conjecture, could offer some clarity about how to move forward with more successful e-waste management programs. (shrink)

Under contract for the series Elements in the Philosophy of Immanuel Kant. -/- The focus of this Element is Kant’s history of human reason: his teleological vision of the past development of our rational capacities from their very emergence until Kant’s own “age of Enlightenment”. One of the goals of this Element is to connect Kant’s speculative account of the very beginning of rationality – a topic which has thus far been largely neglected or at least under-studied in Kantian (...) scholarship – to his well-known theory of humankind’s progress. By doing so, I hope to elucidate Kant’s hopes with regard to reason’s future progress and his guidelines for how to achieve this progress by unifying them with his vision of reason’s past. Another goal of this Element is to bring more attention to Kant’s essay “Conjectural Beginning of Human History” (1786), where a large part of this account is presented, and to show that this “somewhat unusual” (Yovel 1989) text does not stand in conflict with Kant’s critical philosophy and is not merely tangentially related to it, but actually illuminates and complements certain aspects of Kant’s critical philosophy. -/- This Element is divided into three parts. Part 1 introduces Kant’s speculations about the transition our species underwent from non-rational animals into primitive, rational humans. It also shows how these speculations fit with Kant’s broader view of the development of humans’ reason, or of the species’ gradual process of learning how to make a mature (enlightened) use of reason. -/- Part 2 focuses on a text where the speculative account of the beginning of human history is presented in most detail: the “Conjectural Beginning of Human History”. I defend the exegetical importance of this essay for Kant’s practical philosophy by arguing that the claims Kant makes in it are not merely fictional or imaginative, but play a key role in his teleological view of the progression of human history. I also assess the contribution that Kant makes to the conjectural history genre through this essay and discuss how distinct it is from the most prominent and well-studied conjectural histories of the Enlightenment era. -/- Part 3 focuses on what Kant’s account of the history of reason tells us about his political and pedagogical guidelines for the continuance of humanity’s progress toward the fulfillment of its vocation and for the progress of any given individual. I also present and defend my understanding of what it means to think and act in an enlightened (or as Kant also calls it, a “pluralistic”) way, connecting this idea to the three maxims of good thinking, the public use of reason, and the role of interpersonal communication in advancing our rational capacities. (shrink)

John Rawls, among others, has argued that one of aims political philosophy is that it provides reasonable hope in the possibility of justice in the future. But what makes hope reasonable? What sorts of theories of justice are best suited to foster reasonable hope in us? To answer these questions, this paper investigates Rawls’s conception of reasonable hope and the kinds of unreasonableness Rawls sought to guard against with his account of a realistic utopia. Rawls's idea of reasonable hope goes (...) beyond the weaker kind of “reconciliation” put forward by Rousseau’s account of a conjectural history that sketches a picture of how we could have developed into the kind of people and the kind of society where justice is possible. It is one thing to believe, with Rousseau, that our deep natures are not incompatible with the possibility of a just society. It is something further to harbor any hope for this in the future. I argue that this temporal aspect, which is built into what Kant and Rawls mean by reasonable hope, is useful approach to the practice of political philosophy. An approach that takes the need for reasonable hope seriously is one that moves political theorizing from a more passive framework of theoretical imagination toward a more active one that entails political anticipation. (shrink)

In this paper we analyze the uses and misuses of argumentation schemes from verbal classification, and show how argument from definition supports argumentation based on argument from verbal classification. The inquiry has inevitably included the broader study of the concept of definition. The paper presents the schemes for argument from classification and for argument from definition, and shows how the latter type of argument so typically supports the former. The problem of analyzing arguments based on (...) classification is framed in a structure that reveals the crucial role it plays in the persuasion process. The survey of the literature includes the work of Hastings, Perelman, Kienpointner and Schiappa, but still finds much of value in Aristotle. Lessons drawn from Aristotle’s Topics are shown to be useful for developing new tools for assessing definitions and arguments from definition. (shrink)

The paper discusses the origin of dark matter and dark energy from the concepts of time and the totality in the final analysis. Though both seem to be rather philosophical, nonetheless they are postulated axiomatically and interpreted physically, and the corresponding philosophical transcendentalism serves heuristically. The exposition of the article means to outline the “forest for the trees”, however, in an absolutely rigorous mathematical way, which to be explicated in detail in a future paper. The “two deductions” are two (...) successive stage of a single conclusion mentioned above. The concept of “transcendental invariance” meaning ontologically and physically interpreting the mathematical equivalence of the axiom of choice and the well-ordering “theorem” is utilized again. Then, time arrow is a corollary from that transcendental invariance, and in turn, it implies quantum information conservation as the Noether correlate of the linear “increase of time” after time arrow. Quantum information conservation implies a few fundamental corollaries such as the “conservation of energy conservation” in quantum mechanics from reasons quite different from those in classical mechanics and physics as well as the “absence of hidden variables” (versus Einstein’s conjecture) in it. However, the paper is concentrated only into the inference of another corollary from quantum information conservation, namely, dark matter and dark energy being due to entanglement, and thus and in the final analysis, to the conservation of quantum information, however observed experimentally only on the “cognitive screen” of “Mach’s principle” in Einstein’s general relativity. therefore excluding any other source of gravitational field than mass and gravity. Then, if quantum information by itself would generate a certain nonzero gravitational field, it will be depicted on the same screen as certain masses and energies distributed in space-time, and most presumably, observable as those dark energy and dark matter predominating in the universe as about 96% of its energy and matter quite unexpectedly for physics and the scientific worldview nowadays. Besides on the cognitive screen of general relativity, entanglement is available necessarily on still one “cognitive screen” (namely, that of quantum mechanics), being furthermore “flat”. Most probably, that projection is confinement, a mysterious and ad hoc added interaction along with the fundamental tree ones of the Standard model being even inconsistent to them conceptually, as far as it need differ the local space from the global space being definable only as a relation between them (similar to entanglement). So, entanglement is able to link the gravity of general relativity to the confinement of the Standard model as its projections of the “cognitive screens” of those two fundamental physical theories. (shrink)

Non-medical or Social egg freezing (oocyte cryopreservation) is currently a controversial topic in Islam, with contradictory fatwas being issued in different Muslim countries. While Islamic authorities in Egypt permit the procedure, fatwas issued in Malaysia have banned single Muslim women from freezing their unfertilized eggs (vitrified oocytes) to be used later in marriage. The underlying principles of the Malaysian fatwas are that (i) sperm and egg cells produced before marriage, should not be used during marriage to conceive a child; (...) (ii) extraction of mature egg cells from single women being unacceptable; and (iii) fertility preservation in anticipation of late marriage is a conjecture that has not yet occurred. Ovarian tissue freezing can potentially be a more Shariah-compliant alternative to social egg freezing, because once the frozen ovarian cortical tissue sections have been re-transplanted back into the woman, mature egg cells can readily be produced, collected, and fertilized by the husband’s sperm only during the period of marriage contract (′akd al-nikāḥ). Unlike accidental mix-ups with frozen eggs, muddling of lineage (nasab) would be automatically avoided in ovarian tissue freezing due to immunological rejection. However, upon critical analysis based on Qawā’id Fiqhiyyah (Islamic Legal Maxims), Maqāṣid-al-Shariah (Higher Objectives of Islamic Law), and Maslaḥah-Mafsadah (benefits versus harmful effects on society), elective ovarian tissue freezing by healthy single women for social reasons would likely be a highly contentious and controversial issue within Muslim communities that may conflict with conservative social-religious norms. This thus needs further debate among Islamic jurists in dialogue with medical doctors and biomedical scientists. (shrink)

This volume explores the relation between legal reasoning and logic from both a historical and a systematic perspective. The topics addressed include, among others, conditional legal acts, disjunctions in legal acts, presumptions and conjectures, conflicts of values, Jørgensen´s Dilemma, the Rhetor´s Dilemma, the theory of legal fictions and the categorization of contracts. The unifying problematic of these contributions concerns the conditional structures and, more particularly, the relationship between legal theory and legal reasoning in the context of conditions.

An assessment is offered of the progress that the major approaches to quantum gravity have made towards the goal of constructing a complete and satisfactory theory. The emphasis is on loop quantum gravity and string theory, although other approaches are discussed, including dynamical triangulation models (euclidean and lorentzian) regge calculus models, causal sets, twistor theory, non-commutative geometry and models based on analogies to condensed matter systems. We proceed by listing the questions the theories are expected to be able to answer. (...) We then compile two lists: the first details the actual results so far achieved in each theory, while the second lists conjectures which remain open. By comparing them we can evaluate how far each theory has progressed, and what must still be done before each theory can be considered a satisfactory quantum theory of gravity. We find there has been impressive recent progress on several fronts. At the same time, important issues about loop quantum gravity are so far unresolved, as are key conjectures of string theory. However, there is a reasonable expectation that experimental tests of lorentz invariance at Planck scales may in the near future make it possible to rule out one or more candidate quantum theories of gravity. (shrink)

Reasoning from negative evidence takes place where an expected outcome is tested for, and when it is not found, a conclusion is drawn based on the significance of the failure to find it. By using Gricean maxims and implicatures, we show how a set of alternatives, which we call a paradigm, provides the deep inferential structure on which reasoning from lack of evidence is based. We show that the strength of reasoning from negative evidence (...) depends on how the arguer defines his conclusion and what he considers to be in the paradigm of negated alternatives. If we negate only two of the several possible alternatives, even if they are the most probable, the conclusion will be weak. However, if we deny all possible alternatives, the reasoning will be strong, and even in some cases deductively valid. (shrink)

Alan H. Goldman argues for the internalist or subjectivist view of practical reasons on the grounds that it is simpler, more unified, and more comprehensible ...

Reason and Value collects 15 new papers by leading contemporary philosophers on themes from the work of Joseph Raz. Raz has made major contributions in a wide range of areas, including jurisprudence, political philosophy, and the theory of practical reason; but all of his work displays a deep engagement with central themes in moral philosophy. The subtlety and power of Raz's reflections on ethical topics make his writings a fertile source for anyone working in this area. Especially significant are (...) his explorations of the connections between practical reason and the theory of value, which constitute a sustained and penetrating treatment of a set of issues at the very center of moral philosophy as it is practiced today. The contributors to the volume acknowledge the importance of Raz's contributions by engaging critically with his positions and offering independent perspectives on the topics that he has addressed. The volume aims both to honour Raz's accomplishments in the area of ethical theorizing, and to contribute to an enhanced appreciation of the significance of his work for the subject. (shrink)

The value of knowledge and deeds of the methodology of the reasoning defined such as “due to they have a common effective cause (ʿilla), the provision of principle (aṣl) is given to the branch (farʿ)” has been the subject of debate from the first period. That is, on the one hand there are some who reject the method of analogical reasoning by saying that although the authority of legislation belongs to Shāri’only, this method is to make legislation (...) in the religion and that its value in knowledge is condemned as conjecture by the injunction (naṣṣ). They also put forward some arguments as well. However, on the other hand the majority accepts the method of reasoning as an essential and sharʿī (religious) argument. This study will not compare the opinions of those who reject qiyās and that of those who approve it. By means of religious and rational evidences this study will deal with that the method of analogical reasoning is not a rational effort simply, that the knowledge gained by it is not a conjecture criticised by the injunctions, that it is the highest ranking conjecture based on the proof, and that it is sufficient to practice in the field of law. After a general frame is drawn about qiyās, this article has been limited with the place of qiyās in the hierarchy of evidence and its value concerning knowledge and practice. This article wants to clarify the discussions related to the value of knowledge and deeds of the methodology of the reasoning. (shrink)

A remarkable but little studied aspect of current evolutionary theory is the use by many biologists and philosophers of theological arguments for evolution. These can be classed under two heads: imperfection arguments, in which some organic design is held to be inconsistent with God's perfection and wisdom, and homology arguments, in which some pattern of similarity is held to be inconsistent with God's freedom as an artificer. Evolutionists have long contended that the organic world falls short of what one might (...) expect from an omnipotent and benevolent creator. Yet many of the same scientists who argue theologically for evolution are committed to the philosophical doctrine of methodological naturalism, which maintains that theology has no place in science. Furthermore, the arguments themselves are problematical, employing concepts that cannot perform the work required of them, or resting on unsupported conjectures about suboptimality. Evolutionary theorists should reconsider both the arguments and the influence of Darwinian theological metaphysics on their understanding of evolution. (shrink)

Two experiments investigated inferences based on suppositions. In Experiment 1, the subjects decided whether suppositions about individuals' veracity were consistent with their assertions—for example, whether the supposition “Ann is telling the truth and Beth is telling a lie”, is consistent with the premises: “Ann asserts: I am telling the truth and Beth is telling the truth. Beth asserts: Ann is telling the truth”. It showed that these inferences are more difficult than ones based on factual premises: “Ann asserts: I live (...) in Dublin and Beth lives in Dublin”. There was no difference between problems about truthtellers and liars, who always told the truth or always lied, and normals, who sometimes told the truth and sometimes lied. In Experiment 2, the subjects made inferences about factual matters set in three contexts: a truth-inducing context in which friends confided their personality characteristics, a lie-inducing context in which business rivals advertised their products, and a neutral context in which computers printed their program characteristics. Given the supposition that the individuals were lying, it was more difficult to make inferences in a truth-inducing context than in the other two contexts. We discuss the implications of our results for everyday reasoning from suppositions, and for theories of reasoning based on models or inference rules. (shrink)