The Liar Paradox
"This sentence is false." Decide whether you are looking at something true or something false, and see how far you get.
c. 600 BCE (the Epimenides line); c. 350 BCE (Eubulides' paradox)26 min read
Paraconsistent logic; dialetheism
Graham Priest
1948
Logician at the CUNY Graduate Center, and the leading defender of dialetheism — the view that some contradictions are true. On his account the Liar sentence is both true and false, and the correct response is to give up the principle that a contradiction entails everything, rather than to restrict truth or self-reference.