person1950s-2016

Hilary Putnam

Disciplines:

Summary

American philosopher who transformed philosophy of language with semantic externalism and the twin earth thought experiment, and later evolved from scientific realism to pragmatism.

Core Contribution

The Meaning of Meaning: meanings ain't in the head. The twin earth thought experiment shows that the reference of natural kind terms is fixed by the actual nature of substances, not by mental states, founding semantic externalism. Also developed the brain-in-a-vat argument against radical skepticism.

Key Spikes & Highlights

Cut through his career by radically changing positions multiple times: functionalism, then semantic externalism, then internal realism, then pragmatism — each abandonment as thorough as the adoption.
Argued that the brain in a vat scenario is self-refuting: if we were brains in vats, the word 'vat' would refer to something in our simulated experience, not actual vats, so we could not be coherently skeptical about vats.
Insisted that the fact-value dichotomy is a mistake: describing a situation already involves evaluative concepts, and purely descriptive language is a philosophical fiction.

Notable Works & Achievements

The Meaning of Meaning

Reason, Truth and History

Renewing Philosophy

The Collapse of the Fact/Value Dichotomy

Historical Influences

W. V. O. Quine Gottlob Frege William James

Intellectual Lineage

Analytic Philosophy American Pragmatism Logical Positivism

Contemporaries & Peers

Saul Kripke David Lewis W. V. O. Quine Donald Davidson

Minds Influenced

Saul Kripke David Chalmers Tyler Burge John McDowell

Intellectual Posterity

Semantic Externalism Twin Earth Functionalism Internal Realism

Discussing

Hilary Putnam

Ask anything about Hilary Putnam — their ideas, influences, contradictions, legacy.

person1950s-2016

Hilary Putnam

Disciplines:

philosophy of mind

philosophy/philosophy of language

philosophy of mathematics

romanticism/pragmatism

Summary

American philosopher who transformed philosophy of language with semantic externalism and the twin earth thought experiment, and later evolved from scientific realism to pragmatism.

Core Contribution

Key Spikes & Highlights

Cut through his career by radically changing positions multiple times: functionalism, then semantic externalism, then internal realism, then pragmatism — each abandonment as thorough as the adoption.
Argued that the brain in a vat scenario is self-refuting: if we were brains in vats, the word 'vat' would refer to something in our simulated experience, not actual vats, so we could not be coherently skeptical about vats.
Insisted that the fact-value dichotomy is a mistake: describing a situation already involves evaluative concepts, and purely descriptive language is a philosophical fiction.

Notable Works & Achievements

The Meaning of Meaning

Reason, Truth and History

Renewing Philosophy

The Collapse of the Fact/Value Dichotomy

Historical Influences

W. V. O. Quine Gottlob Frege William James

Intellectual Lineage

Analytic Philosophy American Pragmatism Logical Positivism

Contemporaries & Peers

Saul Kripke David Lewis W. V. O. Quine Donald Davidson

Minds Influenced

Saul Kripke David Chalmers Tyler Burge John McDowell

Intellectual Posterity

Semantic Externalism Twin Earth Functionalism Internal Realism

Discussing

Hilary Putnam

Ask anything about Hilary Putnam — their ideas, influences, contradictions, legacy.