Héctor-Neri Castañeda

Castañeda introduced the concept of the quasi-indexical (or quasi-indicator), a linguistic device by which one person can attribute an indexical reference to another. His discussion on this matter strongly influenced John Perry's theory of indexicals, an influence which Perry acknowledged in the first footnote of the paper "The Problem of the Essential Indexical" (1979).

In addition to his other academic honors, Castañeda received grants from the National Endowment for the Humanities, the Andrew W. Mellon Foundation, and the National Science Foundation. He served as president of the American Philosophical Association Central Division from 1979–1980, and was named to the American Academy of Arts and Sciences in 1990. Castañeda was awarded the Presidential Medal of Honor by the Government of Guatemala in 1991.

He moved to Indiana University in 1969, and eventually became the Mahlon Powell Professor of Philosophy as well as that university's first Dean of Latino Affairs, a position he held from 1978–1981. He was a fellow at the Center for Advanced Study in the Behavioral Sciences from 1981–1982.

Following his brief stay at Duke University, Castañeda's first full-time academic appointment was as a professor in the Philosophy department at Wayne State University, where he taught from 1957–1969. It was there that he founded the philosophical journal Noûs, in 1967. From 1962–1963, he was also a visiting professor at the University of Texas at Austin. He was granted a fellowship from the Guggenheim Foundation between 1967 and 1968.

Born in San Vicente, Zacapa, Guatemala, he emigrated to the United States in 1948 and studied under Wilfrid Sellars at the University of Minnesota, where he earned a B.A. in 1950 and M.A. in 1952. Castañeda received his Ph.D. in June 1954 from the University of Minnesota for his dissertation The Logical Structure of Moral Reasoning. Sellars served as his doctoral advisor. He studied at Oxford University from 1955–1956, after which he once again returned to the U.S. to take a sabbatical-replacement position in philosophy at Duke University. Castañeda is noted for his development of guise theory, which he applied to outstanding problems in the analysis of thought, language, and the structure of the world. He is also credited with the discovery of the "quasi-indexical".

Héctor-Neri Castañeda (December 13, 1924 – September 7, 1991) was a Guatemalan-American philosopher and founder of the journal Noûs.