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Michael Dummett

Analytic · Europe · 1925 to 2011

English philosopher who held that meaning is tied to what we can recognise as true. Some claims, he said, may lack a definite truth.

What it is

Michael Dummett (1925 to 2011) was an English philosopher who worked on logic, language, mathematics and the nature of truth. He spent his career at Oxford and is known for an acclaimed study of the logician Gottlob Frege and for developing the argument that a claim's meaning is tied to what we could recognise as showing it true or false.

He went to Winchester College and served in the armed forces from 1943 to 1947. He then studied philosophy, politics and economics at Christ Church, Oxford, took a first-class degree in 1950 and won a fellowship at All Souls College. He was reader in the philosophy of mathematics from 1962 to 1974, and from 1979 until he retired in 1992 he was Wykeham Professor of Logic at Oxford.

The main ideas

  • Reading Frege. Frege: Philosophy of Language (1973) is regarded as a classic study of Frege.
  • Realism. In Dummett's use, a realist about some subject holds that every sentence of it is determinately true or false, even if we have no means of finding out which.
  • Anti-realism. The anti-realist replies that to understand a sentence is to be able to recognise what would count as evidence for or against it. Then there is no guarantee that every sentence is determinately true or false.
  • One debate at a time. He treated the quarrel as arising in many areas, among them mathematics, the past, the future and other minds, so that it can be taken up in each area in turn.
  • A link to mathematics. The dispute resembles an older one in the philosophy of mathematics, between intuitionism and platonism.

What it looks like in practice

Imagine someone asks whether a stranger on a street a hundred years ago was left-handed, when no record could ever show it. The realist says the question has an answer anyway. The anti-realist says it is not clear that it does, since nothing could count as showing it. Dummett's approach was to ask what we mean when we speak of the past. This is an illustration of the debate, not an example from his writing.

Books and moments

  • Frege: Philosophy of Language (1973) is a classic study of Frege.
  • Campaigning against racism. He was politically active as a campaigner against racism.
  • Other subjects. He also wrote about voting procedures and the history of card games.

Questions and criticism

  • Is meaning about evidence. It is fair to ask whether understanding a sentence really amounts to recognising what would show it true.
  • A cost to bivalence. Giving up the idea that every sentence is determinately true or false is a large step, and it is fair to ask whether the price is too high.
  • Language settling metaphysics. It is also fair to ask whether a theory of meaning can decide questions about what exists.

Close neighbours

The page on Gottlob Frege is the closest, since much of his work is a reading of Frege. The pages on Ludwig Wittgenstein and Saul Kripke show other twentieth-century accounts of meaning and truth.

Written by epchē in our own words, and checked against independent sources on 29 October 2026. The sources are listed below.

Who they connect to

Influenced by

  • Gottlob Frege · He wrote the first major books on Frege and built his own philosophy of language from them.

Other Analytic thinkers

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