Sinnott-Armstrong has attacked the epistemology of moral intuitionism on the grounds that it is not justified to have some moral beliefs without needing them to be inferred from other beliefs. He believes that our moral judgments are inferentially justified because the “framing effects” which are mostly discussed in the empirical psychology cast doubt on any non-inferential justification. In this paper, I argue that Sinnott-Armstrong’s argument is question begging against intuitionists and his description of epistemological intuitionism is a (...) diluted version that most of intuitionists do not believe, therefore he is not attacking the epistemological intuitionism in its strongest form. I then propose my alternative modest account of epistemological intuitionism. I also reconsider the concept of “non-inferentiality”, as one of the key elements of intuitionist epistemology, and propose a modest account of non-inferentiality. (shrink)

Attributions of moral knowledge are common in everyday life. We say that we know that some actions are morally right or wrong, permitted or required. Yet, how do we know such moral claims? Moral intuitionism is a family of theories in moral epistemology that tries to answer this question. Intuitionists are not skeptics about moral knowledge. They think that there are moral truths for us to know, and further, that knowledge of these truths is possible. What distinguishes intuitionism (...) from other anti-skeptical moral epistemologies is the idea that we can know some moral truths directly, without inferring them from premises. According to many intuitionists, it is possible for us to know that keeping promises is morally right even if we do not hold this belief on the basis of further evidence or proof. While intuitionism was popular in the early twentieth century, it was since dismissed as implausible. Recently, there has been renewed interest in intuitionism. Philosophers have defended updated versions of the theory and argue that the view has been misunderstood. This chapter considers the merits of intuitionism in moral epistemology. In what follows, I examine different ways of being an intuitionist and indicate the relative strengths and weaknesses of various approaches within intuitionism. (shrink)

Covering moral intuition, self-evidence, non-inferentiality, moral emotion and seeming states, Hossein Dabbagh defends the epistemology of moral intuitionism. His line of analysis resists the empirical challenges derived from empirical moral psychology and reveals the seeming-based account of moral intuitionism as the most tenable one. The Moral Epistemology of Intuitionism combines epistemological intuitionism with work in neuroethics to develop an account of the role that moral intuition and emotion play in moral judgment. The book culminates in (...) a convincing argument about the value of understanding moral intuitionism in terms of intellectual seeming and perceptual experience. (shrink)

This paper outlines and defends a moderate intuitionism. The point of departure is the intuitionism of W. D. Ross (1930) in The Right and the Good, conceived as ethically pluralist and epistemologically rationalist. The paper articulates a conception of self-evidence – including mediate as well as immediate kinds – appropriate to a moderate intuitionism, explores some of the resources and varieties of that position, and considers some problems and prospects for a rationalist version of intuitionism. The (...) final section addresses the issue of how best to conceive the nature and grounds of prima facie duty, the problem of whether intuitionism can adequately deal with conflicts of prima facie duties, and the question of how satisfactorily a moderate intuitionism can account for the epistemic status of moral judgments of overall duty and their connection with rational action. (shrink)

This thesis sets out an argument in defence of moral objectivism. It takes Mackie as the critic of objectivism and it ends by proposing that the best defence of objectivism may be found in what I shall call Kantian intuitionism, which brings together elements of the intuitionism of Ross and a Kantian epistemology. The argument is fundamentally transcendental in form and it proceeds by first setting out what we intuitively believe, rejecting the sceptical attacks on those beliefs, and (...) by then proposing a theory that can legitimize what we already do believe. Chapter One sets out our intuitive understanding of morality: that morality is cognitive, moral beliefs can be true or false; that morality is real, we do not construct it; that morality is rational, we can learn about it by rational investigation; and that morality places us under an absolute constraint. The chapter ends by clarifying the nature of that absolute demand and by arguing that the critical idea within morality is the idea of duty. In Chapter Two Mackie’s sceptical attack on objectivism is examined. Four key arguments are identified: that moral beliefs are relative to bfferent agents; that morality is based upon on non-rational causes; that the idea of moral properties or entities is too queer to be sustainable; and that moral objectivism involves queer epistemological commitments. Essentially all of these arguments are shown to be ambiguous; however it is proposed that Mackie has an underlying epistemological and metaphysical theory, scientific empiricism, which is hostile to objectivism and a theory that many find attractive for reasons that are independent of morality. Chapter Three explores the nature of moral rationality and whether scientific empiricism can use the idea of reflective equilibrium to offer a reasonable account of moral rationality. It concludes that, while reflective equilibrium is a useful account of moral rationality, it cannot be effectively reconciled with scientific empiricism. In order to function effectively as a rational process, reflective equilibrium must be rationally constrained by our moral judgements and our moral principles. Chapter Four begins the process of exploring some alternative epistemologies and argues that the only account that remains true to objectivism and the needs of reflective equilibrium is the account of intuitionism proposed by Ross. However this account can be developed further by drawing upon number of Kantian ideas and using them to supplement Ross’s intuitionism. So Chapter Five draws upon a number of Kant's ideas, most notably some key notions from the Critique of Judgement. These ideas are: that we possess a rational will that is subject to the Moral law and determined by practical reason; that we possess a faculty of judgement which enables us to become aware of moral properties and that these two faculties together with the third faculty of thought can function to constitute the moral understanding. Using these ideas the thesis explores whether they can serve to explain how intuitions can be rational and how objectivism can be justified. (shrink)

The shape of contemporary ethics owes a great deal to Henry Sidgwick, through his influence on Rawls, Parfit, and others. No one who reads David Phillips’s outstanding book can be left in the slightest doubt about Sidgwick’s continuing significance for both metaethics and normative ethics. Phillips’s scholarship and his substantive arguments are powerful and insightful, and I find them largely persuasive. So in these remarks I intend merely to raise a few questions about each of his four main..

Foundationalism in moral epistemology is a core tenet of ethical intuitionism. According to foundationalism, some moral beliefs can be known without inferential justification; instead, all that is required is a proper understanding of the beliefs in question. In an influential criticism against this view, Walter Sinnott-Armstrong has argued that certain psychological facts undermine the reliability of moral intuitions. He claims that foundationalists would have to show that non-inferentially justified beliefs are not subject to those defeaters, but this would already (...) constitute a form of inference and hence undermine the possibility of noninferential justification. The goal of my paper is to defend foundationalism against Sinnott-Armstrong’s criticism. After presenting his challenge, I first argue that the most promising objection to it fails. This objection makes the case that defeater-defeaters are not part of the justification, but merely preserve the justification which the original claim provides. I object to this argument by distinguishing between weak and robust defeaters; only weak defeaters, I argue, fall outside the scope of justification, and it is an open question whether Sinnott-Armstrong’s defeaters fall into that category. This leads the way to my own criticism of Sinnott-Armstrong’s challenge: foundationalists in moral epistemology are entitled to the use of defeater-defeaters as part of the justification for moral beliefs as long as those defeater-defeaters themselves do not entail moral claims. Therefore, Sinnott-Armstrong’s challenge does not undermine foundationalism. (shrink)

Essential to moral epistemic intuitionism of the sort proposed by W. D. Ross in the 1930s is the claim that there are self-evident moral propositions that we can be justified in believing solely on the basis of understanding them. Recently, intuitionism in this sense is enjoying something of a renaissance. It is receiving considerable sympathetic attention from such prominent ethicists as Robert Audi, Jonathan Dancy, Brad Hooker, and David McNaughton. ;Of particular interest, I think, is Audi's claim that (...) the most plausible intuitionisms will be what he calls "reflectionist" intuitionisms. By this he means that they will take advantage of what is most plausible in John Rawls's reflective-equilibrium-style moral epistemology, namely, the claim that the extent to which our moral beliefs approach reflective equilibrium---a kind of multi-level integration or coherence---determines, at least in part, how justified we are in holding them. ;In this dissertation I explore the possibility and plausibility of a moral epistemology that is both intuitionist and reflectionist. I develop an objection to Audi's reflectionist intuitionism, and I propose a response in terms of a new account of the relation between intuitive justification and self-evidence. I then consider the implications of this new account concerning whether intuitive justification should be conceived in generalist or particularist, apriorist or aposteriorist, internalist or externalist terms. Finally, I consider whether the resulting sketch of intuitive justification is consistent with any plausible theory of the structure of epistemic justification. In doing so, I say more than has so far been said about the respective roles of both reflectionism and intuitionism in a plausible reflectionist intuitionism. I take the view that the reflectionist intuitionism that emerges from these trials is a new theory built on old foundations which merits consideration in the moral epistemic field. (shrink)

Jonathan Dancy has developed a very refined theory called ethical particularism. He has argued extensively for the metaphysical part of his position. However, the accompanying epistemology is not yet clear. In this paper I will sketch a particularist epistemology that is consistent with Dancy’s particularist metaphysics, although my approach differs in certain respects from epistemological claims Dancy has made. I will defend an epistemology that states: 1. that moral knowledge is based on intuitions and 2. that we need emotions (...) in order to have moral knowledge. I will call this approach ‘affectual intuitionism’. Dancy rejects both claims, but I will argue that his arguments against these claims are not convincing. (shrink)

According to moral intuitionism, at least some moral seeming states are justification-conferring. The primary defense of this view currently comes from advocates of the standard account, who take the justification-conferring power of a moral seeming to be determined by its phenomenological credentials alone. However, the standard account is vulnerable to a problem. In brief, the standard account implies that moral knowledge is seriously undermined by those commonplace moral disagreements in which both agents have equally good phenomenological credentials supporting their (...) disputed moral beliefs. However, it is implausible to think that commonplace disagreement seriously undermines moral knowledge, and thus it is implausible to think that the standard account of moral intuitionism is true. (shrink)

Ethical Intuitionism was the dominant moral theory in Britain for much of the 18th, 19th and the first third of the twentieth century. However, during the middle decades of the twentieth century ethical intuitionism came to be regarded as utterly untenable. It was thought to be either empty, or metaphysically and epistemologically extravagant, or both. This hostility led to a neglect of the central intuitionist texts, and encouraged the growth of a caricature of intuitionism that could easily (...) be rejected before moving on to 'more serious' philosophical theories. More recently, however, this hostility towards ethical intuitionism has subsided. A wide range of moral philosophers, from Aristotelians, to rule-consequentialists, to expressivists, Kantians and deontologists, are beginning to look to the ethical intuitionists's work as a positive resource. It is, therefore, a good time to get clear on what it was that intuitionists said, and re-evaluate their contribution to our understanding of morality. This volume is the first serious engagement with ethical intuitionism in the light of contemporary developments in ethical theory. It contains essays by eminent moral philosophers working in very different traditions whose aim is to clarify and assess ethical intuitionism. Issues addressed include whether the plurality of basic principles intuitionists adhere to can be grounded in some more fundamental principle; the autonomy of ethics and self-evidence; moral realism and internalism; and the open question argument and naturalism. (shrink)

In this paper, I defend a non-skeptical intuitionist approach to moral epistemology from recent criticisms. Starting with Sinnott-Armstrong's skeptical attacks, I argue that a familiar sort of skeptical argument rests on a problematic conception of the evidential grounds of our moral judgments. The success of his argument turns on whether we conceive of the evidential grounds of our moral judgments as consisting entirely of non-normative considerations. While we cannot avoid skepticism if we accept this conception of our evidential grounds, that's (...) because accepting this conception of our evidential grounds is tantamount to accepting the skeptic's conclusion. We have nothing to fear from arguments for skepticism from skepticism. (shrink)

Using the mathematical frameworks of economic preference ranking, subjective probability, and rational learning through empirical evidence, the epistemological implications of teleological ethical intuitionism are pointed out to the extent to which the latter is based on cognitivist and objectivist concepts of value. The notions of objective value and objective norm are critically analysed with reference to epistemological criteria of intersubjectively shared valuative experience. It is concluded that one cannot meaningfully postulate general material theories of morality that could (...) be tested, confirmed or refuted by intersubjective empirical evidence of preferences and values, however loosely the empirical evidence of values may be interpreted. This situation is explained with reference to the ways in which preceived values become systematically influenced by the concomitants of individual valuative experience, but which have nothing to do with contingent subjective interests. (shrink)

In this dissertation I discuss the epistemology of ethical intuitionism, in particular the claim that mature moral agents possess self-evident moral knowledge. Traditional intuitionists such as W.D. Ross have claimed that by reflection, we can acquire knowledge of our basic moral duties such as the duty of veracity or benevolence. Recent defenders of intuitionism such as Robert Audi have further developed this theory and argued that adequate understanding can be sufficient for moral knowledge. I criticize this view and (...) argue that such accounts fail to make a convincing case for a foundationalist moral epistemology. Instead, I propose to separate the question of how we acquire moral knowledge from an account that justifies moral beliefs. In response to the first issue, I draw an analogy between our moral intuitions and chosmkian linguistics; in both areas, I argue, human beings possess a universal, unconscious and (partly) inaccessible system of rules that explains how we come to learn language and to make moral judgments. In regards to the justificatory issue, I address recent evolutionary debunking arguments designed to undermine the claim that our moral judgments track stance-independent truths. I try to show that this conclusion only follows under the assumption of an instrumentalist interpretation of moral reasoning which the intuitionist is not forced to accept. (shrink)

In this paper, we try to confront Robert Audis moral epistemology, namely his intuitionism, based on the concept of a self-evident moral proposition, with two main problems: disagreement and dogmatism within moral discourse. Although Audi can meet those classical objections in his theory, we think that some problems remain. We proceed – after an introduction – in five sections in order to pursue this end. After a short introductory section, we first reconstruct the classical intuitionist moral epistemology. We then (...) discuss the dogmatism and the disagreement objection and, in doing so, introduce Audi’s own version of a moral epistemology. After having proposed that the disagreement objection concerns an explanatory problem, we discuss a second version, namely disagreement as a problem of rationality. In the fourth section we present a third version, disagreement as a problem of moral discourse, understood as an intersubjective enterprise. In the fifth section we propose a solution to disagreement situations of this kind. (shrink)

The aims of this paper are twofold: firstly, to say something about that philosophy of mathematics known as 'intuitionism' and, secondly, to fit these remarks into a more general message for the philosophy of mathematics as a whole. What I have to say on the first score can, without too much inaccuracy, be compressed into two theses. The first is that the intuitionistic critique of classical mathematics can be seen as based primarily on epistemological rather than on meaning-theoretic (...) considerations. The second is that the intuitionist's chief objection to the classical mathematician's use of logic does not center on the use of particular logical principles (in particular, the law of excluded middle and its ilk). Rather on the role the classical mathematician assigns (or at least extends) generally (i.e. regardless of the particular principles used) to the use of logic in the production mathematical proofs. Thus, the intuitionist critique of logic that we shall be presenting is far more radical than that which has commonly been presented. -/- Concerning the second, more general, theme, my claim is this: some restriction of the role of logical inference in mathematical proof such as that mentioned above is necessary if one is to account for the seeming difference in the epistemic conditions of provers whose reasoning is based on genuine insight into the subject-matter being investigated, and would-be provers whose reasoning is based not on such insight, but rather on principles of inference which hold of every subject-matter indifferently. (shrink)

In the recent metaethical literature there has been significant interest in the prospects for what I am denoting ‘Perceptual Intuitionism’: the view that normal ethical agents can and do have non-inferential justification for first-order ethical beliefs by having ethical perceptual experiences, e.g., Cullison 2010, McBrayer 2010, Vayrynen 2008. If true, it promises to constitute an independent a posteriori intuitionist epistemology, providing an alternative to intuitionist accounts which posit a priori intuition and/or emotion as sources of non-inferentially justified ethical beliefs. (...) As it is formulated, it is plausible that a necessary con- dition for the view is the truth of Ethical Perception: normal ethical agents can and do have perceptual experiences as of the instantiation of ethical properties. In this paper a sophisticated and promising account of Ethical Perception is offered. Extant objections are shown to fail. However, it will be argued that it is far from obvious that the account of Perceptual Intuitionism which emerges constitutes an independent alternative to other intuitionist accounts. This is because we have reason to think that ethical perceptual experience may be epistemically dependent on other epistemic sources, e.g. a priori intuition or emotion. (shrink)

I define ethical intuitionism as the view that it is appropriate to appeal to inferentially unsupported moral beliefs in the course of moral reasoning. I mention four common objections to this view, including the view that all such appeals to intuition make ethical theory politically and noetically conservative. I defend intuitionism from versions of this criticism expressed by R.B. Brandt, R.M. Hare and Richard Miller.

Walter Sinnott-Armstrong has developed and progressively refined an argument against moral intuitionism—the view on which some moral beliefs enjoy non-inferential justification. He has stated his argument in a few different forms, but the basic idea is straightforward. To start with, Sinnott-Armstrong highlights facts relevant to the truth of moral beliefs: such beliefs are sometimes biased, influenced by various irrelevant factors, and often subject to disagreement. Given these facts, Sinnott-Armstrong infers that many moral beliefs are false. What then shall we (...) think of our own moral beliefs? Either we have reason to think some of our moral beliefs are reliably formed or we have no such reason. If the latter, our moral beliefs are unjustified. If we have reason to think some moral beliefs are reliably formed, then those beliefs are not non-inferentially justified, because then we’ll have reason to accept something—namely, that they are reliably formed—that entails or supports those beliefs. But then, either way, our moral beliefs are not non-inferentially justified, and so moral intuitionism is false. This paper takes issue with Sinnott-Armstrong’s interesting and widely discussed argument, which we here call the Empirical Defeat Argument (EDA). According to us, the EDA does not defeat moral intuitionism. In section 1, we will set out the argument, briefly reviewing the rationale Sinnott-Armstrong offers for the premises. Then, in section 2, we identify a critical but dubious epistemological assumption concerning the nature of defeat that undergirds the argument. Finally, in section 3, we will defend our challenge to the EDA by answering two objections. (shrink)

The aim of this paper is to establish a phenomenological mathematical intuitionism that is based on fundamental phenomenological-epistemological principles. According to this intuitionism, mathematical intuitions are sui generis mental states, namely experiences that exhibit a distinctive phenomenal character. The focus is on two questions: what does it mean to undergo a mathematical intuition and what role do mathematical intuitions play in mathematical reasoning? While I crucially draw on Husserlian principles and adopt ideas we find in phenomenologically minded (...) mathematicians such as Hermann Weyl and Kurt Gödel, the overall objective is systematic in nature: to offer a plausible approach towards mathematics. (shrink)

Ethical intuitionists regard moral knowledge as deriving from moral intuition, moral observation, moral emotion and inference. However, moral intuitions, observations and emotions are cultural artefacts which often differ starkly between cultures. Intuitionists attribute uncongenial moral intuitions, observations or emotions to bias or to intellectual or moral failings; but that leads to sectarian ad hominen attacks. Intuitionists try to avoid that by restricting epistemically genuine intuitions, observations or emotions to those which are widely agreed. That does not avoid the problem. It (...) also limits epistemically genuine intuitions, observations or emotions to those with meagre content, and the intuitionists offer no plausible explanation for how inference from such insubstantial propositions can engender substantial moral knowledge. Instead of moral knowledge, intuitionism offers the prospect of mutual name-calling between intellectually stagnant groups. I criticise and reject the principle of phenomenal conservatism, to which intuitionists sometimes appeal. (shrink)

After sketching the essentials of L. E. J. Brouwer’s intuitionistic mathematics—separable mathematics, choice sequences, the uniform continuity theorem, and the intuitionistic continuum—this chapter outlines the main philosophical tenets that go hand in hand with Brouwer’s technical achievements. It presents his views about general and mathematical phenomenology and shows how these views ground his positive epistemological and ontological positions and his stinging criticisms of classical mathematics and logic. The chapter then turns to intuitionistic logic and its philosophical side. It first (...) sets out the basic meta-logical technical results, then discusses the relevant philosophical views—those of Arend Heyting and Michael Dummett. It concludes by tracing intuitionism’s philosophical and technical roots in Aristotle and Kant. (shrink)

According to pluralistic intuitionist theories, some of our moral beliefs are non-inferentially justified, and these beliefs come in both an a priori and an a posteriori variety. In this paper I present new support for this pluralistic form of intuitionism by examining the deeply social nature of moral inquiry. This is something that intuitionists have tended to neglect. It does play an important role in an intuitionist theory offered by Bengson, Cuneo, and Shafer-Landau (forth), but whilst they invoke the (...) social nature of moral inquiry in order to argue that ordinary moral intuitions are trustworthy, my argument focuses on what I will call the ‘frontiers’ of moral inquiry. I will show that inclusive and cooperative dialogue is necessary at moral inquiry’s frontiers, and that intuitionists can expect such dialogue to result in both a priori and a posteriori moral beliefs. (shrink)

Since the 2004 publication of his book The Good in the Right, Robert Audi has been at the forefront of the current resurgence of interest in intuitionism – the idea that human beings have an intuitive sense of right and wrong – in ethics. The New Intuitionism brings together some of the world’s most important contemporary writers from such diverse fields as metaethics, epistemology and moral psychology to explore the latest implications of, and challenges to, Audi’s work. The (...) book also includes an opening chapter that surveys the development of contemporary intuitionism and a conclusion that lays the ground for future developments and debates both written by Audi himself, making this an essential survey of this important school of ethical thought for anyone working in the field. (shrink)

In the present day and age, it seems that every constructivist philosopher of mathematics and her brother wants to be known as an intuitionist. In this paper, It will be shown that such a self-identification is in most cases mistaken. For one thing, not any old (or new) constructivism is intuitionism because not any old relevant construction is carried out mentally in intuition, as Brouwer envisaged. (edited).

Intuitionism is most commonly defined in terms of various strong epistemological and metaphysical presuppositions, e.g., that true moral principles are synthetic a priori propositions, known by some special faculty of moral reflection, and the like. I shall not here be concerned with such views. Rather my focus will be upon the program for normative investigation which I have elsewhere argued is implicit in the intuitionists’ writings and which I take to be intuitionism's salient characteristic.

Sensibility theorists such as John McDowell have argued that once we appreciate certain similarities between moral values and secondary qualities, a new meta-ethical position might emerge, one that avoids the alleged difficulties with moral intuitionism and non-cognitivism. The aim of this paper is to examine the meta-ethical prospects of this secondary-quality analogy. Of particular concern will be the extent to which McDowell’s comparison of values to secondary qualities supports a viewpoint unique from that of the moral intuitionist. Once we (...) disentangle the various metaphysical and epistemological strands of McDowell’s analogy, McDowell’s position might appear closer to moral intuitionism than initially supposed. This discussion will also help clarify the intended meaning of the secondary-quality analogy, as well as its significance for ethics more generally. (shrink)

Over the last decade there have been various attempts to use empirical data about people’s dispositions to choose to undermine various moral positions by arguing that our judgements about what to do are unreliable. Usually they are directed at non-consequentialists by consequentialists, but they have also been directed at all moral theories by skeptics about morality. Walter Sinnott-Armstrong has been one of the leading proponents of such general skepticism. He has argued that empirical results particularly undermine intuitionist moral epistemology. This (...) paper is an attempt to look at what intuitionists should say in response. Consider the following argument : Regress (R1) If any person S is ever justified in believing a normative claim that p then S must be able to infer p from other beliefs of S. (shrink)

In Radical Skepticism & Epistemic Intuition Michael Bergmann attempts to overcome the threat of radical skepticism as it arises in several different forms. The key to Bergmann’s response to skepticism is his method of intuitionist particularism wherein we give our intuitions about particular beliefs being justified more weight than we do intuitions about the premises of arguments for skepticism. There are two general problems for Bergmann’s response to skepticism. First, he fails to accurately portray the key principle of the skeptical (...) argument. As a result, much of the apparent motivation for looking to intuitionist particularism as opposed to other responses to skepticism is merely apparent. Second, intuitionist particularism faces significant problems when it comes to the Problem of the Criterion and the resolution of conflicting intuitions. However, a related intuitionist method, one incorporating explanationism, may be able to deliver what intuitionist particularism promises while avoiding its problems. (shrink)

We introduce reactive Kripke models for intuitionistic logic and show that the reactive semantics is stronger than the ordinary semantics. We develop Beth tableaux for the reactive semantics.

In recent years there has been a resurgence of interest in Ethical Intuitionism, whose core claim is that normal ethical agents can and do have non-inferentially justified first-order ethical beliefs. Although this is the standard formulation, there are two senses in which it is importantly incomplete. Firstly, ethical intuitionism claims that there are non-inferentially justified ethical beliefs, but there is a worrying lack of consensus in the ethical literature as to what non-inferentially justified belief is. Secondly, it has (...) been overlooked that there are plausibly different types of non-inferential justification, and that accounting for the existence of a specific sort of non-inferential justification is crucial for any adequate ethical intuitionist epistemology. In this context, it is the purpose of this paper to provide an account of non- inferentially justified belief which is superior to extant accounts, and, to give a refined statement of the core claim of ethical intuitionism which focuses on the type of non- inferential justification vital for a plausible intuitionist epistemology. Finally, it will be shown that the clarifications made in this paper make it far from obvious that two intuitionist accounts, which have received much recent attention, make good on intuitionism’s core claim. (shrink)

According to a posteriori ethical intuitionism, perceptual experiences can provide non-inferential justification for at least some moral beliefs. Moral epistemology, for the defender of AEI, is less like the epistemology of math and more like the epistemology of tables and chairs. One serious threat to AEI comes from the phenomenon of cognitive penetration. The worry is that even if evaluative properties could figure in the contents of experience, they would only be able to do so if prior cognitive states (...) influence perceptual experience. Such influences would undermine the non-inferential, foundationalist credentials of AEI. In this paper, I defend AEI against this objection. Rather than deny that cognitive penetration exists, I argue that some types of cognitive penetrability are actually compatible with AEI's foundationalist structure. This involves teasing apart the question of whether some particular perceptual process has justification-conferring features from the question of how it came to have those features in the first place. Once this distinction is made, it becomes clear that some kinds of cognitive penetration are compatible with the non-inferential status of moral perceptual experiences as the proponent of AEI claims. (shrink)

We construct an extension P of the standard language of classical propositional logic by adjoining to the alphabet of a new category of logical-pragmatic signs. The well formed formulas of are calledradical formulas (rfs) of P;rfs preceded by theassertion sign constituteelementary assertive formulas of P, which can be connected together by means of thepragmatic connectives N, K, A, C, E, so as to obtain the set of all theassertive formulas (afs). Everyrf of P is endowed with atruth value defined classically, (...) and everyaf is endowed with ajustification value, defined in terms of the intuitive notion of proof and depending on the truth values of its radical subformulas. In this framework, we define the notion ofpragmatic validity in P and yield a list of criteria of pragmatic validity which hold under the assumption that only classical metalinguistic procedures of proof be accepted. We translate the classical propositional calculus (CPC) and the intuitionistic propositional calculus (IPC) into the assertive part of P and show that this translation allows us to interpret Intuitionistic Logic as an axiomatic theory of the constructive proof concept rather than an alternative to Classical Logic. Finally, we show that our framework provides a suitable background for discussing classical problems in the philosophy of logic. (shrink)

Issues about information spring up wherever one scratches the surface of logic. Here is a case that raises delicate issues of 'factual' versus 'procedural' information, or 'statics' versus 'dynamics'. What does intuitionistic logic, perhaps the earliest source of informational and procedural thinking in contemporary logic, really tell us about information? How does its view relate to its 'cousin' epistemic logic? We discuss connections between intuitionistic models and recent protocol models for dynamic-epistemic logic, as well as more general issues that emerge.

Ethical intuitionism is the theory of cognition of moral facts and, what’s closely related, a theory that explores the meaning of moral judgments. I’ve been a proponent of this theory discussing it in some of my writing, most notably in Sens i prawda w etyce [Sense and Truth in Ethics], published as a 49th volume in the ”Biblioteka Myśli Semiotycznej” series. Part I of this paper addresses criticisms that Anna Jedynak raised in her review of my book. In part (...) II, I will discuss a theory of moral behaviour proposed by Bogusław Wolniewicz in two of his articles. I consider the idea of moral cognition following from his conception and contrast it with the notion of moral cognition and moral meaning that follow from ethical intuitionism. I hope that the following discussion will help clarify and explain the main ideas behind ethical intuitionism considered as an epistemological and semiotic theory, however problematic it may appear to be. (shrink)

One of the liveliest areas in moral psychology in recent years has been research on the extent to which conscious reasoning leads to the formation of moral judgments. The goal of this chapter is to review and briefly assess three of the leading positions today on this topic - traditional rationalism, social intuitionism, and morphological rationalism - each of which has significant implications for moral epistemology.

L.E.J. Brouwer famously took the subject’s intuition of time to be foundational and from there ventured to build up mathematics. Despite being largely critical of formal methods, Brouwer valued axiomatic systems for their use in both communication and memory. Through the Dutch Mathematical Society, Gerrit Mannoury posed a challenge in 1927 to provide an axiomatization of intuitionistic arithmetic. Arend Heyting’s 1928 axiomatization was chosen as the winner and has since enjoyed the status of being the de facto formalization of intuitionistic (...) arithmetic. We argue that axiomatizations of intuitionistic arithmetic ought to make explicit the role of the subject’s activity in the intuitionistic arithmetical process. While Heyting Arithmetic is useful when we want to contrast constructed objects with platonistic ones, Heyting Arithmetic omits the contribution of the subject and thus falls short as a response to Mannoury’s challenge. We offer our own solution, Doxastic Heyting Arithmetic, or $${\textsf{DHA}}$$, which we contend axiomatizes Brouwerian intuitionistic arithmetic. (shrink)

Elizabeth Anscombe is well-known for her insistence that there are absolutely prohibited actions, though she is somewhat obscure about why this is so. Nonetheless, I contend in this paper that Anscombe is more concerned with the epistemology of absolute prohibitions, and that her thought on connatural moral knowledge – which resembles moral intuition – is key to understanding her thought on moral prohibitions. I shall identify key features of Anscombe’s moral epistemology before turning to investigate its sources, examining the roots (...) of connaturality in Aquinas and comparing it with rationalist ethical intuitionism, which Anscombe differs from in rejecting “good” as a simple, non-natural property. I then develop a two-stage argument about absolute prohibition: The first will be loosely Thomistic, while the second will suggest how Anscombe’s absolute prohibitions can be seen as a continuation of Wittgenstein’s anti-scepticism in On Certainty. I develop an account of absolute prohibitions as a form of Wittgensteinian hinge proposition – they are not the conclusions of deductive arguments, but the foundations for intelligibility in action. (shrink)

The main ideas behind Brouwer’s philosophy of Intuitionism are presented. Then some critical remarks against Intuitionism made by William Tait in “Against Intuitionism” [Journal of Philosophical Logic, 12, 173–195] are answered.

In this paper, I will suggest an unorthodox hybrid theory of ethical justification that combines, on an ontological level, a realist approach with constructivist elements. On an epistemological level, the realist part of the theory will be squared with an intuitionist account. Eventually, the suggested hybrid theory will take the form of an intuitionist ethics of persons. I will start with briefly sketching the ontological shape of the relevant concept of person whereby I will extensively draw on Kant and (...) endorse a realist reading of his ethical theory (2.). Subsequently, I will explain why and how constructivist elements must complement the picture (3.). Then, I will focus on the epistemological shape of the theory. In particular, I will suggest an intuitionist reading of Kant’s doctrine of “the fact of reason” (4.). Next, I will briefly comment on classical intuitionism and on Bernard William’s notion of convergence in ethics (5.). Subsequently, I will compare my approach with Robert Audi’s attempt to refine a Rossian type of intuitionism (6.). Finally, I will revisit the charge of dogmatism that has traditionally been raised against intuitionism (7.). (shrink)

This paper explores Franz Brentano’s metaethics by comparing it to Thomas Reid’s. Brentano and Reid share a commitment to moral realism and they are both aptly classified as intuitionists concerning moral knowledge and the nature of moral judgment. However, their respective versions of intuitionism are importantly different, in ways that reflect more general differences between their respective epistemological views. Sections III and IV of the paper focus more exclusively on Brentano’s metaethics and some of its unorthodox features. These (...) features tie in with notorious difficulties for moral realism concerning the nature of moral truth and the relation between moral judgment and motivation to act. (shrink)

In this review article I focus on Walter-Sinnott-Armstrong's critique of moral intuitionism. Sinnott-Armstrong argues that recent discoveries by empirical psychologists undermine the plausibility of moral intuitionism. In response, I list a number of potential ways in which moral intuitionists might defend their view.

I argue that Greene’s research, although fascinating for many reasons, doesn’t undermine deontological moral philosophy. This is because both sentimentalist and rationalist moral epistemologies, applied to deontological value, predict exactly the data Greene has found. My discussion proceeds in three steps. In the first section I summarize Greene’s brief against deontology. In the second section I draw on standard accounts of moral emotions to suggest that there are ‘deontological emotions’ made rational by appearances of ‘deontological value.’ Finally, I outline a (...) modest but realist intuitionist account of moral intuitions that connects deontological emotion to putative deontological value in a way that predicts Greene’s findings. (shrink)

Robert Audi's ethical intuitionism (Audi, 1997, 1998) deals effectively with standard epistemological problems facing the intuitionist. This is primarily because the notion of self-evidence employed by Audi commits to very little. Importantly, according to Audi we might understand a self-evident moral proposition and yet not believe it, and we might accept a self-evident proposition because it is self-evident, and yet fail to see that it is self-evident. I argue that these and similar features give rise to certain challenges (...) to Audi's intuitionism. It becomes harder to argue that there are any self-evident propositions at all, or more than just a few such propositions. It is questionable whether all moral propositions that we take an interest in are evidentially connected to self-evident propositions. It is difficult to understand what could guide the sort conceptual revision that is likely to take place in our moral theorising. It is hard to account for the epistemic value of the sort of systematicity usually praised in moral theorising. Finally, it is difficult to see what difference the truth of Audi's ethical intuitionism would make to the way in which we (fail to) handle moral disagreement. (shrink)