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Philosophy & ThoughtGreekEnglish

Dichotomy

/daɪˈkɑtəmi/noun

A division into two parts treated as mutually exclusive.

The Greek roots

δίχα
dícha
in two, apart
+
τέμνειν
témnein
to cut

Literally: a cutting in two

The story of the word

Greek astronomers used διχοτομία for the moon at exact half phase, cut down the middle by the terminator. Logicians used it for Plato's method of splitting a class in two and then splitting again until you reach the definition. English kept the logical sense and hardened it, so a dichotomy now implies the two halves exhaust the field, which is precisely the assumption a false dichotomy smuggles in.

How it travelled
Ancient Greek → Latin → English
First recorded
17th century

Same family

trichotomyanatomyatomepitome

In a sentence

The nature-versus-nurture dichotomy collapses the moment you look at a real developmental study.

He set up a dichotomy between craft and industry that the workshop itself disproved.

Built on the same root

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