Analytic & pragmatist · 1950s – today
Analytic philosophy of mind
The mind is studied as part of nature: mental states are explained by what brains do, while consciousness remains the hardest test of that picture.
How can a physical brain have thoughts and feelings?
Behaviourism and Ryle’s attack on the “ghost in the machine” left Cartesian dualism unfashionable, while computers and neuroscience suggested the mind might be explained physically. From the 1950s, philosophers asked what kind of physical explanation could actually work.
Functionalism (Putnam) holds that a mental state is defined by its causal role, not its material, so the same mind could in principle run on neurons or silicon. Critics answer that something is left out: Searle’s Chinese Room says symbol manipulation is not understanding, and Nagel and Chalmers argue that the felt quality of experience, “what it is like”, resists functional explanation. Dennett replies that this “hard problem” is an illusion produced by our intuitions.
- Mental states are defined by their functional roles.
- Manipulating symbols is not the same as understanding them.
- Explaining subjective experience is the “hard problem”.
It laid the conceptual foundations of cognitive science and frames today’s arguments about whether AI systems can think or feel.
Thinkers
1926–2016Hilary PutnamHarvard philosopher who launched functionalism, then criticised it1932–2025John SearleBerkeley philosopher of language and mind, author of the Chinese Roomborn 1937Thomas NagelNYU philosopher who asked what it is like to be a bat1942–2024Daniel DennettTufts philosopher who explained consciousness as the brain’s workborn 1966David ChalmersAustralian philosopher who named the “hard problem” of consciousnessKey texts
Where it came from
Reacted againstRationalismThe field defined itself largely against Descartes’s dualism of an immaterial mind and a mechanical body.Grew out of
Ordinary language philosophyRyle’s attack on the “ghost in the machine” cleared the ground, and his student Dennett carried the project forward.Grew out of
Post-positivist philosophy of scienceQuine’s naturalism, philosophy continuous with science, set the terms for treating the mind as a part of nature.