James Chase

Is Externalism about Content Inconsistent with Internalism about Justification

Since Kripke, Putnam and Burge raised the subject in the 1970s, there has been a vigorous debate about the degree to which the content of contentful mental states is fixed by the social or physical environment of the subject. The debate obviously ramifies in the philosophy of mind and the philosophy of language: more recently, philosophers have begun to explore the consequences of the thesis of wide content (or content externalism) for epistemology.

The logic of Quinean revisability

W.V. Quine is committed to the claim that all beliefs are rationally revisable; Jerrold Katz has argued that this commitment is unstable on grounds of self-application. The subsequent discussion of this issue has largely proceeded in terms of the logic of belief revision, but there is also an issue here for the treatment of Quine’s views in a doxastic modal system. In this paper I explore the treatment of Quinean epistemology in modal terms. I argue that a set of formal revisability desiderata can be distilled from Quine’s epistemic writings, and that there are demonstrably coherent and non-trivial systems that meet these conditions.

Factivity, consistency and knowability

One diagnosis of Fitch’s paradox of knowability is that it hinges on the factivity of knowledge: that which is known is true. Yet the apparent role of factivity (in the paradox of knowability) and non-factive analogues in related paradoxes of justified belief can be shown to depend on familiar consistency and positive introspection principles. Rejecting arguments that the paradox hangs on an implausible consistency principle, this paper argues instead that the Fitch phenomenon is generated both in epistemic logic and logics of justification by the interaction of analogues of the knowability principle and positive introspection theses that are characteristic of, even if not entailed by, epistemic internalism.

The Routledge Handbook of Applied Epistemology

While applied epistemology has been neglected for much of the twentieth century, it has seen emerging interest in recent years, with key thinkers in the field helping to put it on the philosophical map. Although it is an old tradition, current technological and social developments have dramatically changed both the questions it faces and the methodology required to answer those questions. Recent developments also make it a particularly important and exciting area for research and teaching in the twenty-first century. The Routledge Handbook of Applied Epistemology is an outstanding reference source to this exciting subject and the first collection of its kind. Comprising entries by a team of international contributors, the Handbook is divided into six main parts: The Internet Politics Science Epistemic institutions Individual investigators Theory and practice in philosophy. Within these sections, the core topics and debates are presented, analyzed, and set into broader historical and disciplinary contexts. The central topics covered include: the prehistory of applied epistemology, expertise and scientific authority, epistemic aspects of political and social philosophy, epistemology and the law, and epistemology and medicine. Essential reading for students and researchers in epistemology, political philosophy, and applied ethics the Handbook will also be very useful for those in related fields, such as law, sociology, and politics.

Voting and vagueness

How to handle vagueness? One way is to introduce the machinery of acceptable sharpenings, and reinterpret truth as truth-in-all-sharpenings (supervaluationism) or truth-in-some-sharpenings (subvaluationism). A major selling point has been the conservativism of the resulting systems with respect to classical theoremhood and inference. Supervaluationism and subvaluationism possess interesting formal symmetries, a fact that has been used to argue for the subvaluationist approach. However, the philosophical motivation behind each is a different matter. Subvaluationism comes with a standard story (due to Stanislaw Jaśkowski) that is difficult to sign up to. In this paper, I make use of a variant of Putnam’s well-known idea of linguistic deference, and some results in voting theory, to answer this criticism of subvaluationism. The acceptability intuitions of each member of a linguistic community amount to their voting for one or more acceptable sharpenings, with truth then characterised as truth-in-a-(contextually-determined)-sufficiency-of-sharpenings. This produces a family of logical systems that are close relations of subvaluationism, share its conservatism results, yet have stronger philosophical foundations in the workings of externalist content.