1924 – 1991
Hector-Neri Castañeda (1924-1991) was a Guatemalan-American philosopher who made significant contributions to philosophy of language, metaphysics, ethics, and philosophy of mind. He is best known for his theory of guise theory (Guise Theory) in metaphysics and his pioneering work on indexical reference, particularly the analysis of quasi-indicators like 'he himself'.
Developed Guise Theory, a comprehensive ontological framework distinguishing thin individuals (guises) from concrete objects
Pioneered the analysis of quasi-indicators and self-reference (the 'he*' construction)
Founded the journal Noûs in 1967, one of the premier philosophy journals
Made foundational contributions to deontic logic and the logic of practical reasoning
Authored 'Thinking, Language, and Experience' (1989), synthesizing his views on mind and language