Introduction: This article discusses expected utility theory as a normative theory – that is, a theory of how people should make decisions. In classical economics, expected utility theory is often used as a descriptive theory – that is, a theory of how people do make decisions – or as a predictive theory – that is, a theory that, while it may not accurately model the psychological mechanisms of decision-making, correctly predicts people’s choices. Expected utility theory makes faulty predictions about people’s decisions in many real-life choice situations (see Kahneman & Tversky 1982); however, this does not settle whether people should make decisions on the basis of expected utility considerations. The expected utility of an act is a weighted average of the utilities of each of its possible outcomes, where the utility of an outcome measures the extent to which that outcome is preferred, or preferable, to the alternatives. The utility of each outcome is weighted according to the probability that the act will lead to that outcome. Section 1 fleshes out this basic definition of expected utility in more rigorous terms, and discusses its relationship to choice. Section 2 discusses two types of arguments for expected utility theory: representation theorems, and long-run statistical arguments. Section 3 considers objections to expected utility theory; section 4 discusses its applications in philosophy of religion, economics, ethics, and epistemology.
The Contents of Perception
Summary: In this article, the author provides a great overview on the topic of perceptual content, by addressing the following main issues: i) what are perceptual experiences? ii) what can constitute the content of our experience? iii) what is the relation between the content and our experience? iv) in virtue of what experiences have content?
Wisdom
Introduction: What is wisdom? Philosophers, psychologists, spiritual leaders, poets, novelists, life coaches, and a variety of other important thinkers have tried to understand the concept of wisdom. This entry will provide a brief and general overview, and analysis of, several philosophical views on the topic of wisdom. It is not intended to capture the many interesting and important approaches to wisdom found in other fields of inquiry. Moreover, this entry will focus on several major ideas in the Western philosophical tradition. In particular, it will focus on five general approaches to understanding what it takes to be wise: (1) wisdom as epistemic humility, (2) wisdom as epistemic accuracy, (3) wisdom as knowledge, (4) a hybrid theory of wisdom, and (5) wisdom as rationality.
Gottfried Leibniz: Philosophy of Mind
Abstract: Gottfried Wilhelm Leibniz (1646-1716) was a true polymath: he made substantial contributions to a host of different fields such as mathematics, law, physics, theology, and most subfields of philosophy. Within the philosophy of mind, his chief innovations include his rejection of the Cartesian doctrines that all mental states are conscious and that non-human animals lack souls as well as sensation. Leibniz’s belief that non-rational animals have souls and feelings prompted him to reflect much more thoroughly than many of his predecessors on the mental capacities that distinguish human beings from lower animals. Relatedly, the acknowledgment of unconscious mental representations and motivations enabled Leibniz to provide a far more sophisticated account of human psychology. It also led Leibniz to hold that perception—rather than consciousness, as Cartesians assume—is the distinguishing mark of mentality.
Scientific Realism
Abstract: Debates about scientific realism are closely connected to almost everything else in the philosophy of science, for they concern the very nature of scientific knowledge. Scientific realism is a positive epistemic attitude toward the content of our best theories and models, recommending belief in both observable and unobservable aspects of the world described by the sciences. This epistemic attitude has important metaphysical and semantic dimensions, and these various commitments are contested by a number of rival epistemologies of science, known collectively as forms of scientific antirealism. This article explains what scientific realism is, outlines its main variants, considers the most common arguments for and against the position, and contrasts it with its most important antirealist counterparts.
Classical Logic
Summary: This article provides the basics of a typical logic, sometimes called ‘classical elementary logic’ or ‘classical first-order logic’, in a rigorous yet accessible manner. Section 2 develops a formal language, with a syntax and grammar. Section 3 sets up a deductive system for the language, in the spirit of natural deduction. Section 4 provides a model-theoretic semantics. Section 5 turns to the relationships between the deductive system and the semantics, and in particular, the relationship between derivability and validity. The authors show that an argument is derivable only if it is valid (soundness). Then they establish a converse: that an argument is valid only if it is derivable (completeness). They also briefly indicate other features of the logic, some of which are corollaries to soundness and completeness. The final section, Section 6, is devoted to a brief examination of the philosophical position that classical logic is ‘the one right logic’.
Ancient Logic
Summary: A comprehensive introduction to ancient (western) logic from the 5th century BCE to the 6th century CE, with an emphasis on topics which may be of interest to contemporary logicians. Topics include pre-Aristotelian logic, Aristotelian logic, Peripatetic logic, Stoic Logic and a note on Epicureans and their views on logic.
Routledge Philosophy GuideBook to Anscombe’s Intention
Publisher’s Note: G. E. M. Anscombe’s Intention is a classic of twentieth-century philosophy. The work has been enormously influential despite being a dense and largely misunderstood text. It is a standard reference point for anyone engaging with philosophy of action and philosophy of psychology.
In this Routledge Philosophy GuideBook, Rachael Wiseman situates Intention in relation to Anscombe’s moral philosophy and philosophy of mind considers the influence of Aquinas, Aristotle, Frege, and Wittgenstein on the method and content of Intention adopts a structure for assessing the text that shows how Anscombe unifies the three aspects of the concept of intention considers the influence and implications of the piece whilst distinguishing it from subsequent work in the philosophy of action
Ideal for anyone wanting to understand and gain a perspective on Elizabeth Anscombe’s seminal work, this guide is an essential introduction, useful in the study of the philosophy of action, ethics, philosophy of psychology and related areas.
Feminist Perspectives on Sex and Gender
Introduction: Feminism is the movement to end women’s oppression. One possible way to understand ‘woman’ in this claim is to take it as a sex term: ‘woman’ picks out human females and being a human female depends on various anatomical features (like genitalia). Historically many feminists have understood ‘woman’ differently: not as a sex term, but as a gender term that depends on social and cultural factors (like social position). In so doing, they distinguished sex (being female or male) from gender (being a woman or a man), although most ordinary language users appear to treat the two interchangeably. More recently this distinction has come under sustained attack and many view it nowadays with (at least some) suspicion. This entry (around 12 000 words in length) outlines and discusses distinctly feminist debates on sex and gender.
Feminist Metaethics
Abstract: Metaethical questions concern the nature of morality: are there moral properties, and, if so, what kind of thing are they? How do they motivate us? How should we understand moral discourse, and how can we gain moral knowledge?