Epistemological Sources

The expression ‘aware of the fact that’ is a commonplace, not at all a philosopher’s term of art. We often criticize, excuse, admonish, and inform each other by relying on expressions of the form ‘S is (not) aware of the fact that p’ and such uses presuppose the existence of a state of awareness that one can be in or fail to be in with regard to some fact. Here lies the phenomenon of factual awareness. It is conventional in epistemology (...) to treat ‘S is aware of the fact that p’ as either expressing the same thought as ‘S knows that p’ or at least entailing it. As it happens with conventional philosophical views, learning of their failure is often both surprising and theoretically fruitful. This book provides a comprehensive case against the view that factual awareness just is knowledge or even essentially related to knowledge: factual awareness is not identical to, and it does not entail, knowing, being in a position to know, or being capable of knowing. This book provides a systematic exploration of the relation between knowledge and factual awareness, arguing that knowledge is but one species of factual awareness and that we can understand the possession of objective reasons, the normativity of knowledge, and the nature of knowledge in terms of factual awareness. In this way, the state of factual awareness is, structurally and substantively, a more basic type of state than knowledge. If correct, this undermines a number of ways in which knowledge has been regarded as ‘first’ in recent epistemology. (shrink)

There can be little disagreement about whether ideas of sense perception are, for Spinoza, to be classed as passions or actions—the former is obviously the correct answer. All this, however, does not mean that sense perception would be, for Spinoza, completely passive. In this essay I argue argues that there is in the Ethics an elaborate—and to my knowledge previously unacknowledged—line of reasoning according to which sense perception of finite things never fails to contain a definite active component. This argument (...) for activity in sense perception consists of two main parts: first, that ideas we form through sense perception have something adequate in them; second, that the adequate component is actively brought about. Discerning this line of thought connects to—and sheds some new light on—Spinoza’s general way of understanding ideas as entities involving activity. (shrink)

This is an early, alternative version of the paper that became Shieber 2013, “Toward a truly social epistemology: Babbage, the division of mental labor, and the possibility of socially distributed warrant,” Philosophy and Phenomenological Research, 86(2), pp. 266-294. This paper differs from the later paper in a few notable respects. In this earlier paper – written in 2008-9 – I use Hutchins to illustrate the phenomenon of socially distributed cognitive processes, rather than Babbage, and I discuss the attributes of such (...) cognitive processes in greater detail. (shrink)

It seems like experience plays a positive—even essential—role in generating some knowledge. The problem is, it’s not clear what that role is. To see this, suppose that when your visual system takes in information about the world around you it skips the experience step and just automatically and immediately generates beliefs in you about your surroundings. A lot of philosophers think that, in such a case, you would (or at least could) still know, via perception, about the world around you. (...) But then that raises the question: What epistemic role was the experience playing? How did it contribute to your knowledge of your surroundings? Philosophers have given many different answers to these questions. But, for various reasons, none of them has really stuck. In this paper I offer and defend a different answer to these questions—a solution to the problem—which avoids the pitfalls of other answers. I argue that experience is, all by itself, a kind of knowledge—it’s what Bertrand Russell (1912) calls “knowledge of things”. So I argue that experience helps generate knowledge simply by being knowledge. (shrink)

A vast range of our everyday experiences seem to involve an immediate consciousness of value. We hear the rudeness of someone making offensive comments. In seeing someone risking her life to save another, we recognize her bravery. When we witness a person shouting at an innocent child, we feel the unfairness of this action. If, in learning of a close friend’s success, envy arises in us, we experience our own emotional response as wrong. How are these values apprehended? The three (...) most common answers provided by contemporary philosophy explain the consciousness of value in terms of judgment, emotion, or perception. An alternative view endorsed mainly by authors inspired by the phenomenological tradition argues that values are apprehended by an intentional feeling. In this model, it is by virtue of a feeling that objects are presented as being in different degrees and nuances fair or unfair, boring or funny, good or bad. This paper offers an account of this model of feeling and its basic features, and defends it over alternative models. To this end, the paper discusses different versions of the model circulating in current research which until now have developed in parallel rather than in mutual exchange. The paper also applies the proposed account to the moral domain and examines how a feeling of values is presupposed by several moral experiences. (shrink)

This paper aims to argue for, else illustrate the epistemological significance of the use of non transitive similarity relations, mapping only to "types", as methodologically being on a par with the use of transitive similarity relations (equivalence relations), mapping as well to "predicates". -/- In this paper the sketch of an exact but simple geometrical model of the above construct is followed by mentioning respective use cases for non transitive similarity relations from science and humanities. A well known metaphysics example (...) is elaborated along these lines to some extent. (shrink)

This article argues for epistemic decolonization by developing a relational model of knowledge, which we locate within indigenous knowledges. We live in a time of ongoing global, epistemic coloniality, embedded in and shaped by colonial ideas and practices. Epistemological decolonization requires taking nondominant knowledges and their epistemes seriously to open up the possibility of interrogating and dismantling the hegemony of the Western knowledge tradition. We here ask two related questions: What are the decolonial affordances of indigenous knowledges? And how do (...) these compare to other contemporary critiques of epistemic coloniality, specifically those mounted by posthumanism? In answer, we develop three definitional senses of relational with reference to indigenous knowledges. First, we define indigenous knowledges in relation to Western knowledge, with which they share a dialectical origin at the moment of colonial contact. Second, indigenous knowledges are relational in their ontological and axiological orientations. Third, relationality in indigenous knowledge suggests a trialectic space, rather than a dialectic space. We argue for the necessity of an anticolonial framework, which assigns priority to indigenous people’s perceptions and ways of knowing for theorizing recurring colonial relations and their (imperialistic) manifestations in producing and reproducing knowledge. (shrink)

Defendendo a união entre a razão e a experiência como a possibilidade de instauração do desenvolvimento científico, Bacon se contrapõe à indução aristotélica enquanto procedimento que implica a enumeração de casos particulares tendo em vista o objetivo de encontrar o geral existente em todos e em cada um deles em um processo que se detém na soma de fatos, limitando-se à comunicação, na medida em que não tem capacidade de empreender a descoberta do conhecimento. Dessa forma, sobrepondo-se ao acúmulo de (...) fatos sem método, Bacon institui a indução por subtração enquanto processo baseado na eliminação sistemática de experiências inconclusivas, que converge para atribuir valor às experiências negativas e impede as generalizações prematuras, instaurando o experimento enquanto experiência guiada e disciplinada pelo intelecto na fundação do empirismo moderno. (shrink)

O referido trabalho de pesquisa se detém no desenvolvimento do pensamento científico através de uma construção teórico-conceitual baseada em Aristóteles, Bacon, Kant e Popper, convergindo para uma investigação que assinala desde a fundação da ciência em um processo que traz como perspectiva a ciência da substância (ou ciência das quatro causas) de Aristóteles, mostrando a contribuição de Bacon para a instauração da ciência moderna por intermédio da concepção de um novo método indutivo e da união entre ciência e técnica com (...) o objetivo de assegurar o domínio humano sobre a natureza. Dessa forma, o texto também se detém nas implicações epistemológicas da revolução copernicana de Immanuel Kant, cuja perspectiva, emergindo das fronteiras que inter-relacionam o racionalismo de Leibniz, o empirismo de Hume e a ciência positiva físico-matemática de Newton, instaura o horizonte do idealismo transcendental, estabelecendo a correlação fundamental envolvendo o sujeito e o objeto do conhecimento. Finalizando, a investigação sublinha que, se a leitura da epistemologia clássica e a perspectiva dos adeptos do "empirismo lógico" assinalam que a ciência demanda a exclusão de tudo aquilo que não se impõe ao horizonte que envolve a dedutibilidade analítica e a verificabilidade, Karl Popper defende que mais do que saber quando e em que condição uma teoria dialoga com a verdade a relevância não acena senão para a demarcação entre ciência e não ciência, particularmente no tocante às fronteiras que abrangem a ciência que carrega autenticidade (que emerge através da construção de Newton, submetida ao aperfeiçoamento e à correção de Einstein) e as ideologias (marxismo e psicanálise), tornando-se imprescindível a busca de uma resposta para a questão referente ao critério capaz de estabelecer o estatuto científico de um universo teórico ou de um enunciado. (shrink)

This work will focus on Józef Maria Bocheński’s inclination towards seeing the world and its logical structure from the point of view of ontology. In section 2, we shall discuss the perception of the world deriving from Bocheński, while in the third section – issues of its logical structure will be dealt with. In section 4, we will present a formal framework of the structure of the world.

ABSTRACTShould conciliating with disagreeing peers be considered sufficient for reaching rational beliefs? Thomas Kelly argues that when taken this way, Conciliationism lets those who enter into a disagreement with an irrational belief reach a rational belief all too easily. Three kinds of responses defending Conciliationism are found in the literature. One response has it that conciliation is required only of agents who have a rational belief as they enter into a disagreement. This response yields a requirement that no one should (...) follow. If the need to conciliate applies only to already rational agents, then an agent must conciliate only when her peer is the one irrational. A second response views conciliation as merely necessary for having a rational belief. This alone does little to address the central question of what is rational to believe when facing a disagreeing peer. Attempts to develop the response either reduce to the first response, or deem necessary an unnecessary doxastic revision, or imply that rational dilemmas obtain in cases where intuitively there are none. A third response tells us to weigh what our pre-disagreement evidence supports against the evidence from the disagreement itself. This invites epistemic akrasia. (shrink)

Empirical findings about intuitions putatively cast doubt on the traditional methodology of philosophy. Herman Cappelen and Max Deutsch have argued that these methodological concerns are unmotivated as experimental findings about intuitions are irrelevant for assessments of the methodology of philosophy—I dub this the ‘Irrelevance Claim’. In this paper, I first explain that for Cappelen and Deutsch to vindicate the Irrelevance Claim from a forceful objection, their arguments have to establish that intuitions play no epistemically significant role whatsoever in philosophy—call this (...) the ‘Orthogonality Claim’. I then argue that even under a charitable reading of their views Cappelen and Deutsch fail to establish the Orthogonality Claim. Lastly, I discuss empirical evidence that the Orthogonality Claim is false. The arguments in this paper will demonstrate that Cappelen and Deutsch cannot motivate the Irrelevance Claim and that their replies to recent experimental attacks on traditional methodology of philosophy do not succeed. (shrink)

Abstract In this article, I offer an account of how the individualized and medicalized conception of disability that prevailsin philosophy is naturalized in bioethics, cognitive science, feminist philosophy, political philosophy, and other subfields of the discipline. By the end of the article, I will have both indicated how disabled people are constituted in philosophical discourse as a problem to be rectified or eliminated and explained how the prevalence in philosophy of this naturalized conceptionof disability contributes to and reinforces the exclusion (...) ofdisabled philosophersfrom the profession of philosophy. Critical philosophical work on disability is an important means with which to resist and subvert this exclusion. (shrink)

This paper offers a reading of Hartmann’s philosophy of literature from the perspective of contemporary aesthetics. In particular, I focus on his defense of the truth-value of literary works. After outlining the main concern of the paper (sect. 1), I place Hartmann’s view within the context of current aesthetic cognitivism (sect. 2). In the following three sections, I discuss Hartmann’s account, examining his critique of the thesis that literature is cognitively valuable because it transmits factual truths (sect. 3); his defense (...) of the view that literature discloses life (sect. 4); and the link between cognitive value and the ontology of the literary work (sect. 5). Finally, I discuss Hartmann’s focus on the concept of “truth” in the light of recent debates on knowledge of “what it is like” and on “understanding” (sect. 6). (shrink)

Throughout her work, Audre Lorde maintains that her self-preservation in the face of oppression depends on acting from the recognition and valorization of her feelings as a deep source of knowledge. This claim, taken as a portrayal of agency, poses challenges to standard positions in ethics, epistemology, and moral psychology. This article examines the oppositional agency articulated by Lorde’s thought, locating feeling, poetry, and the power she calls “the erotic” within her avowed project of self-preservation. It then explores the implications (...) of taking seriously Lorde’s account, particularly for theorists examining ethics and epistemology under nonideal social conditions. For situations of sexual intimacy, for example, Lorde’s account unsettles prevailing assumptions about the role of consent in responsibility between sexual partners. I argue that obligations to solicit consent and respect refusal are not sufficient to acknowledge the value of agency in intimate encounters when agency is oppositional in the way Lorde describes. (shrink)

Interpretation of the verses of Qurʿān has a history back to the early revelation. Muslims believe that Qurʿān is the word of God, which is revealed to Muhammad, and therefore, understanding the real purpose of the Qurʿān, is vital. Reading the Qurʿān, for traditional Muslims was not like reading a scientific or historical text, it was rather encountering with a metaphysical reality that is formulated in the form of the letters, words, verses, and chapters with the goal of educating man (...) to realize his/her potential faculties in becoming what he/she is created for. In this encounter with a sacred reality that connected them to both visible and invisible realm, they sought to find out the core meaning of the revealed message. Sufis described the text in a way was such as a mirror in which everyone who tried to look at it saw himself. This paper investigates the mirror in which Sufis looked upon the Islamic revelation. (shrink)

In his proposal of an ethics for the technologic civilization, Hans Jonas criticizes Kant’s ethics whereas incorporates some of its fundamental concepts. This paper intends to scrutinize Jonas’ critique, arguing that the Kantian moral philosophy is justifiable in face of it and also able to overcome certain difficulties that may affect the pillars of Jonas’ ethics of future. Moreover, in a concise way, this work will discuss the matter of a possible conciliation between the material character of Jonas’ ethics and (...) the alleged categorical character of its principle and examine Jonas’ essay to present a metaphysical groundwork to his ethics. As both that groundwork and that conciliation seem to be problematic, a critical return to the groundwork to the Kantian ethics is suggested, once one can find in it valuable heuristic arguments that allow some ground for rethinking the foundations of Jonas’ ethics of future. (shrink)

Bayesian epistemology provides a popular and powerful framework for modeling rational norms on credences, including how rational agents should respond to evidence. The framework is built on the assumption that ideally rational agents have credences, or degrees of belief, that are representable by numbers that obey the axioms of probability. From there, further constraints are proposed regarding which credence assignments are rationally permissible, and how rational agents’ credences should change upon learning new evidence. While the details are hotly disputed, all (...) flavors of Bayesianism purport to give us norms of ideal rationality. This raises the question of how exactly these norms apply to you and me, since perfect compliance with those ideal norms is out of reach for human thinkers. A common response is that Bayesian norms are ideals that human reasoners are supposed to approximate – the closer they come to being ideally rational, the better. To make this claim plausible, we need to make it more precise. In what sense is it better to be closer to ideally rational, and what is an appropriate measure of such closeness? This article sketches some possible answers to these questions. (shrink)

Sextus Empiricus offers an underappreciated and under-discussed version of dream-based skepticism. Most philosophers interested in dreams and skepticism focus on the question of how you know you are not currently dreaming. Sextus points out that our waking experiences and dreams often conflict. And, the challenge goes, what reason do you have to trust the one over the other? This question presupposes that dreams and waking experiences are distinguishable. Thus the kinds of responses typically offered against dream-based skepticism do not apply. (...) And if we accept an idea upheld by one camp in the contemporary debate over the epistemology of disagreement, Sextus’ challenge is difficult to answer. A G.E. Moore-inspired response to the problem is also proposed and explored. It is argued that Sextus’ version of the problem reveals a certain limitation in that sort of approach to skeptical problems. (shrink)

Sobrepondo uma concepção crítica envolvendo os fundamentos do saber às ontologias dogmáticas que se impõem ao trabalho que implica a apreensão das questões filosóficas, o projeto kantiano propõe o fim da filosofia como construção metafísica e a necessidade de se lhe atribuir uma tarefa teórica de caráter essencialmente genealógico e crítico, no sentido que encerra a legitimação do conhecimento racional através da análise das faculdades que se lhe estão atreladas, conforme assinala o artigo, que se detém nos direitos da razão (...) cuja legitimidade a lógica da verdade reconhece e cuja ilegitimidade a lógica da aparência denuncia, convergindo para as fronteiras que encerram a possibilidade da construção do conhecimento científico, à medida que, tornando o entendimento o legislador universal da natureza e circunscrevendo a utilização das categorias aos limites da experiência possível, propõe as condições necessárias para fundá-lo sobre os juízos sintéticos a priori. (shrink)

O artigo em questão se detém nas implicações epistemológicas da revolução copernicana de Immanuel Kant, cuja perspectiva, emergindo das fronteiras que inter-relacionam o racionalismo de Leibniz, o empirismo de Hume e a ciência positiva físico-matemática de Newton, instaura o horizonte do idealismo transcendental, estabelecendo a correlação fundamental envolvendo o sujeito e o objeto do conhecimento.

While the author cannot speak for churches of Christ, common among them are unique ways of understanding holy scripture, believed to have been written by the apostles and prophets of the Lord before the destruction of Jerusalem (70 A.D.) and circulated among the early Christian communities (E.g. A letter called First Clement in about 95 A.D., refers to at least ten New Testament books), then collected as a volume by the self-identified Christian community of the second century A.D. or earlier, (...) e.g. the list of Marcion (140 A.D.). (shrink)

In a recent issue of this journal, Miloud Belkoniene challenges explanationist accounts of evidential support in two ways. First, he alleges that there are cases that show explanatory virtues are not linked to the truth of hypotheses. Second, he maintains that attempts to show that explanatoriness is relevant to evidential support because it adds to the resiliency of probability functions fail. I contest both of Belkoniene’s claims.

We propose a formal framework to examine the relationship between models and observations. To make our analysis precise,models are reduced to first-order theories that represent both terminological knowledge – e.g., the laws that are supposed to regulate the domain under analysis and that allow for explanations, predictions, and simulations – and assertional knowledge – e.g., information about specific entities in the domain of interest. Observations are introduced into the domain of quantification of a distinct first-order theory that describes their nature (...) and their organization and takes track of the way they are experimentally acquired or intentionally elaborated. A model mainly represents the theoretical knowledge or hypotheses on a domain, while the theory of observations mainly represents the empirical knowledge and the given experimental practices. We propose a precise identity criterion for observations and we explore different links between models and observations by assuming a degree of independence between them. By exploiting some techniques developed in the field of social choice theory and judgment aggregation, we sketch some strategies to solve inconsistencies between a given set of observations and the assumed theoretical hypotheses. The solutions of these inconsistencies can impact both the observations – e.g., the theoretical knowledge and the analysis of the way observations are collected or produced may highlight some unreliable sources – and the models – e.g. empirical evidences may invalidate some theoretical laws. (shrink)

_Tell Me Something I Don’t Know_ is a collection of original dialogues in epistemology, suitable for student readers but also of interest to experts. Familiar problems, theories, and arguments are explored: second-order knowledge, epistemic closure, the preface paradox, skepticism, pragmatic encroachment, the Gettier problem, and more. New ideas on each of these issues are also offered, defended, and critiqued, often in humorous and entertaining ways.

ABSTRACTI draw attention to certain differences between how seventeenth‐century philosophers thought about knowledge and how contemporary philosophers think about it. These differences do not strike me as particularly subtle; they are gross enough that we might wonder about the extent to which seventeenthth‐century philosophers and modern philosophers are interested in the same thing. We might also wonder about the extent to which it is helpful to apply the same label—say, ‘epistemology’—to both sets of interests. I think, for example, one might (...) reasonably raise the question, Is there any epistemology, in our sense of the term, in Spinoza or Leibniz? (shrink)

This paper looks at statements I am in a position to make ‘straight off’: observational judgements, perceptual and memory statements, statements about my posture, my intentions, and so on. These kinds of statement pose a problem: what is the nature of my entitlement to them? I focus on observational judgements and on two contrasting approaches to them. The first, which I reject, provides an account of my warrant for them; the second, which I defend, disconnects my entitlement from possession of (...) a justification. I consider what light the second approach sheds on the other kinds of statements I am in a position to make straight off. (shrink)

The notion of ‘bipolar’ or ‘second‐personal’ normativity is often illustrated by such situations as that of one person addressing a complaint to another, or asserting some right, or claiming some authority. This paper argues that the presence of speech acts of various kinds in the development of the idea of the ‘second‐personal’ is not accidental. Through development of a notion of ‘illocutionary authority’ I seek to show a role for the ‘second‐personal’ in ordinary testimony, despite Darwall's argument that the notion (...) of the ‘second‐personal’ marks a divide between practical and theoretical reason. (shrink)

In this careful and fresh analysis of the relationships between facts, words and beliefs, the author attempts to clarify how images and words relate to the world so as to establish beliefs and support knowledge. The reader is first presented with the ontological background of the analysis, including the status of sense-data, the nature of universals and our experience of them, and the epistemological status of the world. Sprigge then turns to a discussion of semiotic background including pragmatic and semantic (...) meaning, and the nature of reference. After supplying these foundations, the heart of the book concentrates upon the act of believing with attention focused upon the idea of the image, and the distinction drawn between imagism, imagist-activism, and imagist-mentalism, the latter of which he supports. He also defends phenomenalism against the criticisms of Austin, while developing as well a doctrine of intentionality rooted in Findlay’s interpretation of Meinong. He offers an extensive critique of behaviorism leading to his imagist-mentalism position, while his analysis of belief takes serious issue with Russell. (shrink)

In charging argumentum ad hominem, we accuse someone of attacking the source of a claim. In charging argumentum ad verecundiam, we attack the source of a claim. This is reason for attending to "attacking the source." It is important to distinguish probabilistic reasons for doubting a claim and evidentiary reasons. Evidence that the source of a claim is likely to be wrong is not evidence against the claim. The tendency to overlook this is the essential feature of the ad hominem (...) fallacy. This is relevant in assessing the view that someone who regards his thinking as made possible by Godless arrangements of matter largely determined by chance is, in taking this attitude, advancing a hypothesis which undermines his theorizing about the world or himself. (shrink)

Laurence BonJour divides approaches to a priori justification into three kinds. Quine’s radical empiricism denies the existence of any special category of a priori justification; moderate empiricism attempts to explain a priori justification in terms of something like knowledge of meaning or grasp of concepts; and rationalism postulates an irreducible ‘rational insight’ into the nature of reality. The positions therefore form a familiar trio of eliminativism, reductionism and anti-reductionism concerning a priori justification. BonJour’s interesting and (in the present philosophical climate) (...) unusual project is to defend rationalism, the anti-reductionist position. Rationalism says that we have an ability to ‘directly or intuitively see or grasp or apprehend … a necessary fact about the nature or structure of reality’ (pp. 15-16). ‘An apparent rational insight,’ he says, ‘purports to be nothing less than a direct insight into the necessary character of reality’ (p. 107). Two clarifications will help to mark out the distinctive character of this view: first, that rational insight is fallible; and second, that although BonJour carefully distinguishes the concepts of necessity and apriority, he none the less claims that rational insight yields a priori knowledge of necessary truths only. On his view, the contingent a priori does not exist, although empirical necessities do... (shrink)

Intuition and introspection are very interesting terms in Elzenberg’s thought. The intuition is connected with the earlier phase of Elzenberg’s philosophy. Intuition is a form of world cognition. It is tool of selection of the contents. In Elzenberg’s philosophy introspection is a later term than intuition. It may lead intuition but is not a necessity. Process of cognition can finish with introspection which is a phase of information collection. In this meaning introspection creates circumstances for intuition. Introspection is a form (...) of analysis internal human world but intuition permits discovery of new worlds. According to Elzenberg we can find intuition in art and in mysticism. Introspection in ethical and aesthetical texts has often existed. Intuition has most spectacular character than introspection generally. Intuition is a form of discovery of different human worlds while introspection is form of research of them. (shrink)

I reconstruct and critique two arguments Laurence BonJour has recently offered against skepticism about the a priori. While the arguments may provide anti-skeptical, internalist foundationalists with reason to accept the a priori, I show that neither argument provides sufficient reason for believing the more general conclusion that there is no rational alternative to accepting the a priori.

In a recent paper, Manuel Pérez Otero attempted to turn the tables on Paul Boghossian's claim that content externalism is incompatible with the 'a priority of our logical abilities'. In reply, Boghossian argued that Pérez Otero's criticism misses the main point of his argument through concentrating on the semantics of singular terms. I elaborate on Boghossian's reply by showing that even taken on its own terms Pérez Otero's paper fails to engage with internalism through systematically misrepresenting what a truly internalistic (...) account of the semantics of singular terms should be. (shrink)

Originally published in 1961. This book is a study of some important ways of knowledge and experience and of the symbols through which they become articulate. Both ‘knowledge’ and ‘experience’ are interpreted in wide senses which are sanctioned by common use – though not always by the usage of philosophers and scientists. The four main fields considered are: the arts, religion, moral knowledge, and our knowledge of one another. These fields, though distinguishable, are nevertheless found to be interrelated in subtle (...) and interesting ways, and it is contended that increase of ‘wisdom’, or ‘educated understanding’, can be achieved only through acceptance and assimilation of all their many-sided disciplines into personal insight. The book deals in a new way with questions of perennial interest which, because they are fundamental, are difficult. Nevertheless, the writing is lucid and untechnical and addressed to a wide range of readers. (shrink)