Etymology

tertium non datur

Today it means: For every proposition, either it is true or its negation is true. Full definition →

Latin tertium non datur
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The story

  1. Latin · borrowed fromtertium non datur
  2. English todaytertium non datur

Borrowed from Latin tertium non datur. Literally, “A third thing is not given.”.

Etymology from Wiktionary, CC BY-SA 4.0.