tertium non datur

== English == === Etymology === Borrowed from Latin tertium non datur. Literally, “A third thing is not given.”. === Phrase === tertium non datur For every proposition, either it is true or its negation is true. ==== Translations ==== ==== See also ==== law of excluded middle == Italian == === Etymology === Borrowed from Latin tertium non datur. Literally, “A third thing is not given.” === Phrase === tertium non datur tertium non datur