Noun
liar paradox (plural liar paradoxes)
(philosophy, logic) A paradox involving statements such as "this sentence is false", or "the following statement is true: the previous statement is false", which cannot be meaningfully regarded as either true or false.
Graham Priest has argued the liar paradox is a true dialetheia.
According to Diogenes Laërtius, Chrysippus wrote twelve works in 23 books on the Liar paradox ; seven works in 17 books on amphiboly ; and another nine works in 26 books on other conundrums. Source: Internet