Scepticism (or skepticism), the belief that requires all information to be well supported by evidence, originated in the Skeptikoi, a first century BC Greek school who “asserted nothing.” The school was founded by Aenesidemus; our main source of the school’s teachings is Sextus Empiricus and the leader of the Sceptics was Pyrrho of Elis (365-275 BC) who had traveled to India and studied with the gymnosophists ('naked lovers of wisdom'). From India, Pyrrho brought back the idea that nothing can be known for certain. The senses are easily fooled, and reason follows too easily our desires. Along with Stoicism and Epicureanism, Scepticism was one of the three dominant schools of Hellenistic Philosophy. A sextet of sceptic texts has been collected in this anthology: Pyrrhonic Sketches by Sextus Empiricus. Life of Pyrrho by Diogenes Laërtius. Sextus Empiricus and Greek Scepticism by Mary Mills Patrick. The Greek Sceptics: from Pyrrho to Sextus by Norman MacColl. Stoics and Sceptics by Edwyn Bevan. Life of Carneades by Diogenes Laërtius.