Coined by Graham Priest and Richard Routley, from di- + Ancient Greek ἀλήθεια (alḗtheia, “truth”), in 1981.
dialetheism (usually uncountable, plural dialetheisms)
- (logic) The theory that statements can be both true and false at the same time and in the same sense. The opposite of the law of noncontradiction. [from 1981]
2005, Laurence Goldstein, Logic: key concepts in philosophy, page 158:
[It] is important to point out that endorsing dialetheism is not the same as rejecting logic or rational argumentation.
- Priest, Graham. 'Dialetheism', Stanford Encyclopedia of Philosophy. 2008.
- Priest, Graham, Sylvan, Richard, Norman, Jean, and Arruda, Ayda Ignez (eds.). Paraconsistent Logic: Essays on the Inconsistent. München: Philosophia Verlag. 1989: p. xx