tertium non datur

phrase

For every proposition, either it is true or its negation is true.

OriginLatin tertium non datur →
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Meanings

phrase
  1. For every proposition, either it is true or its negation is true.

Origin

  1. Latintertium non datur
  2. Englishtertium non datur

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

More words from Latin

Full word history & related roots →

Translations

Polish tertium non datur
  • tertium non daturthere are only two possibilities
Russian третьего не дано
  • третьего не дано (tretʹjevo ne dano)there are only two possibilities
Cite this entry
APA

tertium non datur. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/tertium%20non%20datur

MLA

“tertium non datur.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/tertium%20non%20datur. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “tertium non datur,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/tertium%20non%20datur.

Source: tertium non datur on Wiktionary, CC BY-SA 4.0.