Thomas Samuel Kuhn (1922–1996) is one of the most influential philosophers of science of the twentieth century, perhaps the most influential. His 1962 book The Structure of Scientific Revolutions is one of the most cited academic books of all time. Kuhn’s contribution to the philosophy of science marked not only a break with several key positivist doctrines, but also inaugurated a new style of philosophy of science that brought it closer to the history of science. His account of the development (...) of science held that science enjoys periods of stable growth punctuated by revisionary revolutions. To this thesis, Kuhn added the controversial ‘incommensurability thesis’, that theories from differing periods suffer from certain deep kinds of failure of comparability. (shrink)

This entry provides an overview of theories of concepts that is organized around five philosophical issues: (1) the ontology of concepts, (2) the structure of concepts, (3) empiricism and nativism about concepts, (4) concepts and natural language, and (5) concepts and conceptual analysis.

Richard Rorty (1931–2007) developed a distinctive and controversial brand of pragmatism that expressed itself along two main axes. One is negative—a critical diagnosis of what Rorty takes to be defining projects of modern philosophy. The other is positive—an attempt to show what intellectual culture might look like, once we free ourselves from the governing metaphors of mind and knowledge in which the traditional problems of epistemology and metaphysics (and indeed, in Rorty's view, the self-conception of modern philosophy) are rooted. The (...) centerpiece of Rorty's critique is the provocative account offered in Philosophy and the Mirror of Nature (1979, hereafter PMN). In this book, and in the closely related essays collected in Consequences of Pragmatism (1982, hereafter CP), Rorty's principal target is the philosophical idea of knowledge as representation, as a mental mirroring of a mind-external world. Providing a contrasting image of philosophy, Rorty has sought to integrate and apply the milestone achievements of Dewey, Hegel and Darwin in a pragmatist synthesis of historicism and naturalism. Characterizations and illustrations of a post-epistemological intellectual culture, present in both PMN (part III) and CP (xxxvii-xliv), are more richly developed in later works, such as Contingency, Irony, and Solidarity (1989, hereafter CIS), in the popular essays and articles collected in Philosophy and Social Hope (1999), and in the four volumes of philosophical papers, Objectivity, Relativism, and Truth (1991, hereafter ORT); Essays on Heidegger and Others (1991, hereafter EHO); Truth and Progress (1998, hereafter TP); and Philosophy as Cultural Politics (2007, hereafter PCP). In these writings, ranging over an unusually wide intellectual territory, Rorty offers a highly integrated, multifaceted view of thought, culture, and politics, a view that has made him one of the most widely discussed philosophers in our time. (shrink)

Alonzo Church (1903–1995) was a renowned mathematical logician, philosophical logician, philosopher, teacher and editor. He was one of the founders of the discipline of mathematical logic as it developed after Cantor, Frege and Russell. He was also one of the principal founders of the Association for Symbolic Logic and the Journal of Symbolic Logic. The list of his students, mathematical and philosophical, is striking as it contains the names of renowned logicians and philosophers. In this article, we focus primarily on (...) Church’s philosophical contributions. (For an account of his life and academic history see the Introduction to The Collected Works of Alonzo Church (2019).) However, we also discuss his mathematical results when it is desirable to do so in order to pursue a philosophical issue. (shrink)