In this impressive second edition of Theory of Knowledge, Keith Lehrer introduces students to the major traditional and contemporary accounts of knowing. Beginning with the traditional definition of knowledge as justified true belief, Lehrer explores the truth, belief, and justification conditions on the way to a thorough examination of foundation theories of knowledge,the work of Platinga, externalism and naturalized epistemologies, internalism and modern coherence theories, contextualism, and recent reliabilist and causal theories. Lehrer gives all views careful examination and concludes (...) that external factors must be matched by appropriate internal factors to yield knowledge. This match of internal and external factors follows from Lehrer’s new coherence theory of undefeated justification. In addition to doing justice to the living epistemological traditions, the text smoothly integrates several new lines that will interest scholars. Also, a feature of special interest is Lehrer’s concept of a justification game.This second edition of Theory of Knowledge is a thoroughly revised and updated version that contains several completely new chapters. Written by a well-known scholar and contributor to modern epistemology, this text is distinguished by clarity of structure, accessible writing, and an elegant mix of traditional material, contemporary ideas, and well-motivated innovation. (shrink)

Much research in the last two decades has demonstrated that human responses deviate from the performance deemed normative according to various models of decision making and rational judgment (e.g., the basic axioms of utility theory). This gap between the normative and the descriptive can be interpreted as indicating systematic irrationalities in human cognition. However, four alternative interpretations preserve the assumption that human behavior and cognition is largely rational. These posit that the gap is due to (1) performance errors, (2) computational (...) limitations, (3) the wrong norm being applied by the experimenter, and (4) a different construal of the task by the subject. In the debates about the viability of these alternative explanations, attention has been focused too narrowly on the modal response. In a series of experiments involving most of the classic tasks in the heuristics and biases literature, we have examined the implications of individual differences in performance for each of the four explanations of the normative/descriptive gap. Performance errors are a minor factor in the gap; computational limitations underlie non-normative responding on several tasks, particularly those that involve some type of cognitive decontextualization. Unexpected patterns of covariance can suggest when the wrong norm is being applied to a task or when an alternative construal of the task should be considered appropriate. Key Words: biases; descriptive models; heuristics; individual differences; normative models; rationality; reasoning. (shrink)

This book is available either individually, or as part of the specially-priced Arguments of the Philosphers Collection.

In this collection of essays, Lehrer argues that freedom, rationality, consensus, and knowledge depend on "metamental" operations--thoughts about thoughts--and are impossible without them. Metamental operations provide for our optionality, plasticity, and most of all, for the evaluation and control of lower-level information. The human mind, he argues, is essentially a metamind.

This introductory text is written for students faced with the question "what is history?

Academic dishonesty among students is not confined to the dynamics of the classrooms in which it occurs. The institution has a major role in fostering academic integrity. Ways that institutions can have a significant impact on attitudes toward and knowledge about academic integrity as well as reducing the incidence of academic dishonesty are described. These include the content of an effective academic honesty policy, campus-wide programs designed to foster integrity, and the development of a campus-wide ethos that encourages integrity.

Inter-species variation in colour perception poses a serious problem for the view that colours are mind-independent properties. Given that colour perception varies so drastically across species, which species perceives colours as they really are? In this paper, I argue that all do. Specifically, I argue that members of different species perceive properties that are determinates of different, mutually compatible, determinables. This is an instance of a general selectionist strategy for dealing with cases of perceptual variation. According to selectionist views, objects (...) simultaneously instantiate a plurality of colours, all of them genuinely mind-independent, and subjects select from amongst this plurality which colours they perceive. I contrast selectionist views with relationalist views that deny the mind-independence of colour, and consider some general objections to this strategy. (shrink)

The notion of simulation in dreaming of threat recognition and avoidance faces difficulties deriving from (1) some typical characteristics of dream artifacts (some “surreal,” some not) and (2) metaphysical issues involving the need for some representation in the theory of a perspective subject making use of the artifact. [Hobson et al.; Revonsuo].

Counterfactual reasoning research typically demonstrates contrast effects—nearly winning evokes frustration, whereas nearly losing evokes exhilaration. The present work, however, describes conditions under which assimilative responses (i.e., when judgements are pulled towards a comparison standard) also occur. Participants solved analogies and learned that they had either nearly attained a target score or nearly failed to attain it. Participants in the no trajectory condition received this feedback in the absence of any prior feedback, whereas those in the trajectory condition received feedback after (...) having received prior feedback conforming to either an ascending or descending pattern. Participants then provided perceptions of their verbal intelligence. Assimilation effects were observed in the trajectory conditions but attenuated in the no trajectory conditions. Discussion focuses on the role of feedback dynamics in determining responses to close-call counterfactuals. (shrink)

This chapter discusses the nature of software maintenance in light of software’s ontological status. A realist view of software need not commit us to the otiose position that software maintenance is impossible. Many philosophers and computer scientists have been concerned with drawing attention to software’s dual nature, its being both symbolic and physical, abstract and concrete. There are strong connections to be found between this topic and recent investigations in the philosophy of linguistics, particularly the metaphysics of words. It is (...) shown, contra Irmak, that software can be best understood through a realist type-token distinction employing an ontology of composite objects that was put forward by Katz. This approach employs both non-spatiotemporal abstract types and tokens of those types. Further developing Katz’s realist approach can help to make better sense of the dual nature of computational artefacts and their maintenance than the alternatives outlined. Young claims that a prevalent imbalanced view of maintenance as solely conservative is due to a misunderstanding of the nature of artefacts as being realisations of their producers’ intentions. This is a problem for theories of artefacts that employ intentions, such as the one involved with the realist view of software and software maintenance. Software maintenance on this view is not solely conservative but also adaptive and enhancive, constituting a source of counterexamples to Young’s claim. An alternative explanation of the imbalanced view is provided, based on observations by software engineers, especially Sommerville. (shrink)

In light of the complexity of some important matters, the best epistemic strategy for laypersons is often to rely heavily on the judgments of subject matter experts. However, given the contentiousness of some issues and the existence of fake experts, determining who to trust from the lay perspective is no simple matter. One proposed approach is for laypersons to attend to displays of intellectual virtue as indicators of expertise. I argue that this strategy is likely to fail, as non-experts often (...) display apparent intellectual virtues while legitimate experts often display apparent intellectual vices. Then, I argue that this challenge is difficult to overcome, as experts who attempt to better exhibit apparent intellectual virtues would likely compromise their own reliability in the process. Finally, I discuss two conclusions—one more optimistic and one more pessimistic—that one might draw concerning the role of intellectual virtue in the identification of experts. (shrink)

In Delusions and Other Irrational Beliefs , Lisa Bortolotti argues that the irrationality of delusions is no barrier to their being classified as beliefs. This comment asks how Bortolotti’s position may be affected if we accept that there are two distinct types of belief, belonging to different levels of mentality and subject to different ascriptive constraints. It addresses some worries Bortolotti has expressed about the proposed two-level framework and outlines some questions that arise for her if the framework is adopted. (...) It also suggests that, rather than being beliefs that fail to meet the relevant standards of rationality, delusions may be non-doxastic acceptances that were never meant to meet them. (shrink)

The dissociation of fluid cognitive functions from g is implicit in the Cattell-Horn-Carroll gF-gC theory. Nevertheless, Blair is right that fluid functions are extremely important. I suggest that the key mental operation assessed by measures of gF is the ability to sustain mental simulation while keeping the relevant representations decoupled from the actual world – an ability that underlies all hypothetical thinking. (Published Online April 5 2006).

Volume 19, Issue 10, October 2019, Page 68-70.

This paper considers the nature of a curriculum as presented in formal curriculum documents, and the inherent difficulties of representing formal disciplinary knowledge in a prescription for teaching and learning. The general points are illustrated by examining aspects of a specific example, taken from the chemistry subject content included in the science programmes of study that are part of the National Curriculum in England. In particular, it is suggested that some statements in the official curriculum document are problematic if we (...) expect a curriculum to represent canonical disciplinary knowledge in an unambiguous and authentic manner. The paper examines the example of the requirement for English school children to be taught that chemical reactions take place in only three different ways and considers how this might be interpreted in terms of canonical chemistry and within the wider context of other curriculum statements, in order to make sense of neutralisation and precipitation reactions. It is argued that although target knowledge that is set out as the focus of teaching and learning cannot be identical to disciplinary knowledge, the English National Curriculum offers a representation of chemistry which distorts and confuses canonical ideas. It is suggested that the process of representing the disciplinary knowledge of chemistry as curriculum specifications is worthy of more scholarly attention. (shrink)

This book is an extended discussion of individualism in the philosophy of mind.

In this paper, I raise some interconnected concerns for Paul Horwich’s minimal theory of truth, framed by these three questions: How should the minimal theory be formulated? How does the minimal theory address the liar paradox? What is the explanatory role of the concept of truth? I conclude that we cannot be linguistic or conceptual deflationists about truth.

In this article, I shed new light on a misunderstood aspect of Heraclitus’ style. The opposites employed by Heraclitus are often of equal status except that one member of each pair may also appear as a designation for the encompassing whole. I begin by discussing two interpretations of this phenomenon, which were put forward by Roman Dilcher and Alexander Mourelatos. The phenomenon is, I suggest, better understood as being an example of what is known as markedness neutralisation. I argue that (...) this phenomenon should be interpreted as further undermining what Mourelatos identified as a naïve paratactic metaphysics of mere things (NMT), to which Heraclitus was reacting by beginning to develop a hypotactic metaphysics of hierarchies and dependencies as part of a view of the world as being logos-textured. Further, I consider a series of three problems that were put forward by Dilcher, which he thinks must be addressed by anyone who claims that Heraclitus held a unity of opposites thesis. I also consider some related issues, and provide some responses. (shrink)

The three main kinds of theory in normative ethics, namely, consequentialism, deontology, and virtue ethics, are often presented as the ‘palette’ from which we may choose, or use as a starting point for an investigation. However, this way of doing ethics and philosophy, by the palette, may be leading some of us astray. It has led some to believe that all that there is to ethics, and to ethics of AI, is given in terms of these already devised petrified categories (...) of theory. It has also led others to abandon normative ethics and philosophy altogether and to resort to descriptive methods that are then used to justify action. I wish to argue that (1) we should not abandon traditional philosophical approaches, but (2a) this does not entail that the petrified palette should constitute the beginning of our philosophical investigations. Further, (2b) I recommend a non-methodological approach in which it is instead radical questions that spur these investigations, which arise through consideration of the practical actions (potential or otherwise) of machines and their programmers. (shrink)

The Anglican Thirty Nine Articles join catholic Christendom in affirming that: There is but one living and true God…and in unity of this Godhead there be three Persons of one substance, power, and eternity; the Father, the Son, and the Holy Ghost.

Ecophilosophers have long argued that addressing the environmental crisis not only demands reassessing the ethical aspects of human and nature relations, but also prevailing theories of human nature. Philosophical anthropology has historically taken this as its calling, and its resources may be profitably utilized in the context of ecophilosophy. Distinguishing between conservative and emancipatory naturalism leads to a critical discussion of the Cartesian culture/nature dualism. Marjorie Grene is discussed as a resource in the tradition of philosophical anthropology which enables us (...) to avoid dualistic thinking and espouse an emancipatory naturalism by resisting reductionism and acknowledging the diffuse dependence of human being on natural processes. In order to fully explicate the conditions of human dependence upon nature it becomes necessary to define an appropriate approach to ontology. This critical ontology facilitates a stratified understanding of the place of humans in nature without lapsing into reductivism or post-Kantian constructivism. It provides a sounder basis than either alternative for motivating a many- sided ecophilosophical perspective on human being. (shrink)

This article explores the pros and cons of teaching moral development and moral psychology theories and principles in media ethics courses. Five theorists are introduced: Kohlberg, Gilligan, Rest, Kierkegaard, and Perry. Debates over the descriptive-prescriptive nature of the models are discussed, and a number of suggestions about how to implement the models in the classroom are offered.

This is the second book in a trilogy which explores major concepts in the four major scriptural faiths of the world: Judaism, Islam, Hinduism, and Christianity. Part I dealt with Revelation, whilst this new book focuses on the question of creation. As well as looking at what modern thinkers across the world have had to say on the topic, the book also considers the insights of modern physics, and shows how the universe can be seen as the expression of the (...) mind and heart of God. (shrink)

From epic to limerick, novel to anecdote, literary narratives engage and entertain us. From autobiography and biography to accounts of familial generations, narratives define communities. Myths and histories loom large in religious traditions as well. Recently, the importance of narrative to ethics and religion has become a pervasive theme in several scholarly disciplines. In the essays presented here, a distinguished roster of scholars addresses a range of issues associated with this theme, focusing especially on questions concerning narrative's contribution to knowledge.

The issue of what constitutes a valid logical inference is a difficult question. At a minimum, we believe a permissible step in a proof must provide the reader with rational grounds to believe that the new step is a logically necessary consequence of previous assertions. However, this begs the question of what constitutes these rational grounds. Formalist accounts typically describe valid rules of inferences as those that can be found by applying one of the explicit rules of inference in the (...) formal system in which the proof is couched. However, philosophers of mathematics find such a description unhelpful because many inferences in the proofs that mathematicians actually produce cannot be expressed in a formal language, at least not without seriously distorting the semantic content of the inference (e.g., Larvor, 2012). In this chapter, we investigate mathematicians’ perceptions of a particular kind of inference in a particular setting. Specifically, we shed light on what types of graphical inferences mathematicians find permissible in a real analysis proof. Following Larvor (in press), we examine mathematicians’ reactions to metrical graphical inferences (i.e., inferences whose validity depends on the accuracy of the graph that was drawn and whose validity can be changed by minor deformations) and nonmetrical graphical inferences (i.e., inferences whose validity does not depend on a the accuracy of the graph and whose validity is not vulnerable to local deformations). The goal of this chapter is threefold. First, we demonstrate that most mathematicians reject metrical graphical inferences as impermissible in a real analysis proof. Second, we show that many mathematicians regard nonmetrical graphical inferences as permissible in a real analysis proofs. Third, we illustrate how mathematicians collectively disagree on the permissibility of nonmetrical inferences. (shrink)

God, who is an omnipotent, omniscient, and omnibenevolent Creator and Providence, exists and There is evil are logically compatible claims. God exists, If God exists, then He has a morally sufficient reason for allowing any evil that He does allow , and There is evil is a consistent triad of propositions. Thus any pair from that triad is also consistent. Thus God exists and There is evil are logically compatible. But this does not settle the question as to whether the (...) truth of There is evil in the world has such consequences for theism as making it highly improbable that God exists or making it unreasonable to believe that God exists . That propositions P and Q are logically compatible does not entail that one does not provide powerful evidence against the other. In particular, it has seemed that some actual evils are gratuitous or in some manner just could not fit into a God-made world. Thus the simple argument is offered that: There are gratuitous evils; If there are gratuitous evils, then there is no God; so: There is no God. I will call this simple argument the ‘root argument’, for it is this argument and sophistications of it that will occupy us hereafter. (shrink)

Merleau-Ponty’s specific theory of negation has received surprisingly little attention within the literature. Given his engagement with Sartre, not to mention Hegel and Marx, one would think that this concept and its surrounding issues and problems would occupy a more central place within various readings and interpretations. This essay attempts to give some indications of how to think about a Merleau-Pontian theory of negativity specifically. By re-reading the “Temporality” chapter from Phenomenology of Perception in dialogue with later writings and lectures, (...) I propose a theory of “integration” and “disintegration” of temporal passage in place of a dialectic of pure being and nothingness. This theory organizes various themes in Merleau-Ponty’s work, including sense-genesis and his references to the “scream of light”. (shrink)

Based on a general review of international, representative tissue banking policies that were described in the medical, ethics, and legal literature, this paper reviews the range of standards, both conceptually and in existing regulations, relevant to four main factors:(1) commercialization, (2) confidentiality, (3) informed consent, and (4) quality of research. These four factors were selected as reflective of some of the major ethical considerations that arise in the conduct of tissue banking research. The authors emphasize that any policy or ethical (...) guidelines designed to regulate tissue bank research should address all four factors. Whenever this sort of research is conducted between several institutions or several countries, the paper suggests that the relevant entities work collaboratively to harmonize their standards. (shrink)

This research note investigates the socio-demographics of one aspect of the ‘digital divide’, namely computer use and attitudes. The results are drawn from a large-scale survey of computer use and attitudes among the adult population of Flanders. They show that computer non-use and negative attitudes towards digital developments, far from being limited to relatively small segments of society, are reported by over 40% of respondents. Regression analyses indicate that level of education is the strongest predictor variable of computer disquietude, followed (...) by age and then gender. The implications of these results are briefly discussed. (shrink)

In this paper, we explore the role of syntactic representations in set theory. We highlight a common inferential scheme in set theory, which we call the Syntactic Representation Inferential Scheme, in which the set theorist infers information about a concept based on the way that concept can be represented syntactically. However, the actual syntactic representation is only indicated, not explicitly provided. We consider this phenomenon in relation to the derivation indicator position that asserts that the ordinary proofs given in mathematical (...) discourse indicate syntactic derivations in a formal logical system. In particular, we note that several of the arguments against the derivation indicator position would seem to imply that set theorists could gain no benefits from the syntactic representations of concepts indicated by their definitions, yet set theorists clearly do. (shrink)