Noun
dialetheism (usually uncountable, plural dialetheisms)
English Wikipedia has an article on:dialetheismWikipedia
(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]
Dialetheism Graham Priest advocates the view that under some conditions, some statements can be both true and false simultaneously, or may be true and false at different times. Source: Internet
Dialetheism raises its own problems. Source: Internet