Roderick Chisholm

Roderick Milton Chisholm (November 27, 1916 – January 19, 1999) was an American philosopher known for his work on epistemology, metaphysics, free will, value theory, and the philosophy of perception.

Richard and Fred Feldman, writing in the Stanford Encyclopedia of Philosophy, remark that he "is widely regarded as one of the most creative, productive, and influential American philosophers of the 20th Century."

Chisholm graduated from Brown University in 1938 and received his Ph.D. at Harvard University in 1942 under Clarence Irving Lewis and D. C. Williams.

He was drafted into the United States Army in July 1942 and did basic training at Fort McClellan in Alabama.

Chisholm administered psychological tests in Boston and New Haven.

In 1943 he married Eleanor Parker, whom he had met as an undergraduate at Brown.

Chisholm's first major work was Perceiving (1957).

His epistemological views were summed up in a popular text, Theory of Knowledge, which appeared in three very different editions (1966, 1977, and 1989).

His masterwork was Person and Object, its title deliberately contrasting with W. V. O. Quine's Word and Object.

Chisholm was a metaphysical Platonist in the tradition of Bertrand Russell, and a rationalist in the tradition of Russell, G. E. Moore, and Franz Brentano; he objected to Quine's anti-realism, behaviorism, and relativism.

Chisholm defended the possibility of empirical knowledge by appeal to a priori epistemic principles whose consequences include that it is more reasonable to trust your senses and memory in most situations than to doubt them.

His theory of knowledge was also famously "foundationalist" in character: all justified beliefs are either "directly evident" or supported by chains of justified beliefs that ultimately lead to beliefs that are directly evident.

He also defended a controversial theory of volition called "agent causation" much like that of Thomas Reid.

He argued that free will is incompatible with determinism, and believed that we do act freely; this combination of views is known as libertarianism.

He developed a highly original theory of first person thought according to which the things we believe are properties, and believing them is a matter of self-attributing them.

(A similar view was developed independently by David Kellogg Lewis, and enjoys considerable popularity, although it is now known mainly through Lewis's work.) Chisholm was also famous for defending the possibility of robust self-knowledge (against the skeptical arguments of David Hume), and an objective ethics of requirements similar to that of W. D. Ross.

Chisholm's other books include The Problem of the Criterion, Perceiving, The First Person and A Realist Theory of the Categories, though his numerous journal articles are probably better known than any of these.

Chisholm read widely in the history of philosophy, and frequently referred to the work of Ancient, Medieval, Modern, and even Continental philosophers (although the use he made of this material has sometimes been challenged).

Nonetheless, he greatly respected the history of philosophy, in the face of a prevailing indifference among Analytic philosophers.

Chisholm translated some work by Brentano and by Husserl, and contributed to the post-1970 renaissance of mereology.

He spent his academic career at Brown University and served as president of the Metaphysical Society of America in 1973.

Chisholm argued for the primacy of the mental over linguistic intentionality, as suggested in the title of Person and Object (1976) that was deliberately contrasted with Quine's Word and Object (1960).

He was editor of Philosophy and Phenomenological Research from 1980 until 1986.

Chisholm trained many distinguished philosophers, including Selmer Bringsjord, Fred Feldman, Keith Lehrer, James Francis Ross, Richard Taylor, and Dean Zimmerman.

He also had a significant influence on many colleagues, including Jaegwon Kim and Ernest Sosa.

In this regard, he defended the direct attribution theory of reference in The First Person (1981).

He argues that we refer to things other than ourselves by indirectly attributing properties to them, and that we indirectly or relatively attribute properties to them by directly attributing properties to ourselves.

Suppose the following bed scene:

If I were M and "U" were W, then I could directly attribute to myself the property (1) or M-B-W, while indirectly to "U" the property (2) or W-B-M, thereby referring to "U".

That is, to say (1) is relatively to say (2), or to explicate M-B-W is to implicate W-B-M.

His idea of indirect attribution (1981) is relevant to John Searle's "indirect speech act" (1975) and Paul Grice's "implicature" (1975), in addition to entailment.

Stylistically, Chisholm was known for formulating definitions and subsequently revising them in the light of counterexamples.

This led to a joke definition of a new verb:

"chisholm, v. To make repeated small alterations in a definition or example. 'He started with definition (d.8) and kept chisholming away at it until he ended up with (d.8′′′′′′′′).'"

While intended as a joke, the term has found some use in serious philosophical papers (for example, Kevin Meeker's "Chisholming away at Plantinga's critique of epistemic deontology").

In his book Person and Object, Chisholm endorses a mereological essentialism for everyday objects such as tables and chairs.

He distinguishes two ways of thinking about identity of such objects and the way in which they may lose or gain parts over time: a "strict philosophical sense" and a "loose sense."

In a strict philosophical sense, we must say that everyday vulgar objects do not persist through even the slightest change of parts.

This is a strict mereological essentialist view.

If any part of an everyday or 'vulgar' object is lost or gained over time, the object would cease to exist.