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
Stoicism
Chrysippus of Soli
279 BCE – 206 BCE
Third head of the Stoa and the principal architect of Stoic logic. Diogenes Laertius' catalogue of his lost works lists at least six titles on the Liar, which makes him the first thinker known to have treated the paradox as a serious research programme rather than a debating trick.