Jennifer Hornsby

Book synopsis: "What is truth?" has long been the philosophical question par excellence. The Nature of Truth collects in one volume the twentieth century's most influential philosophical work on the subject. The coverage strikes a balance between classic works and the leading edge of current philosophical research. The essays center around two questions: Does truth have an underlying nature? And if so, what sort of nature does it have? Thus the book discusses both traditional and deflationary theories of truth, as well as phenomenological, postmodern, and pluralist approaches to the problem. The essays are organized by theory. Each of the seven sections opens with a detailed introduction that not only discusses the essays in that section but relates them to other relevant essays in the book. Eleven of the essays are previously unpublished or substantially revised.

Among philosophical questions about human agency, one can distinguish in a rough and ready way between those that arise in philosophy of mind and those that arise in ethics. In philosophy of mind, one central aim has been to account for the place of agents in a world whose operations are supposedly ‘physical’. In ethics, one central aim has been to account for the connexion between ethical species of normativity and the distinctive deliberative and practical capacities of human beings. Ethics then is involved with questions of moral psychology whose answers admit a kind of richness in the life of human beings from which the philosophy of mind may ordinarily prescind. Philosophy of mind, insofar as it treats the phenomenon of agency as one facet of the phenomenon of mentality, has been more concerned with how there can be ‘mental causation’ than with any details of a story of human motivation or of the place of evaluative commitments within such a story.

I want to promote what I shall call ‘the identity theory of truth’. I suggest that other accounts put forward as theories of truth are genuine rivals to it, but are unacceptable. A certain conception of thinkables belongs with the identity theory’s conception of truth. I introduce these conceptions in Part I, by reference to John McDowell’s Mind and World; and I show why they have a place in an identity theory, which I introduce by reference to Frege. In Part II, I elaborate on the conception of thinkables, with a view to demonstrating that the identity theory’s conception of truth is defensible. Part III is concerned with the theory’s relation to some recent work on the concept of truth: I hope to show that the identity theorist not only has a defensible conception of truth, but also, in the present state of play, has appropriate ambitions.

This chapter replies to arguments, advanced by Gonzalo Rodriguez–Pereyra, for thinking that the intuitions that have inspired theories of truthmaking cannot be accommodated without commitment to truth-making entities. It contains a suggestion about why, even if there are no entities that make propositions true, we should nonetheless be apt to think of truth as grounded. The advocates of truthmakers engage sometimes in a specifically ontological enquiry of a wide-ranging sort, sometimes in the project of understanding truth. Inasmuch as Rodriguez–Pereyra's manner of defending a truthmaker principle makes connections with both of these projects, the objections to his account made in the chapter rebound on them both.