id author title date pages extension mime words sentences flesch summary cache txt en-wikipedia-org-5402 Edmund Gettier - Wikipedia .html text/html 1484 240 55 Gettier III (/ˈɡɛtiər/; born October 31, 1927) is an American philosopher and Professor Emeritus at the University of Massachusetts Amherst. He is best known for his short 1963 article "Is Justified True Belief Knowledge?", which has generated an extensive philosophical literature trying to respond to what became known as the Gettier problem. The result was a three-page article that remains one of the most famous in recent philosophical history. In his article, Gettier challenges the "justified true belief" definition of knowledge that dates back to Plato's Theaetetus, but is discounted at the end of that very dialogue. Some philosophers, however, thought the account of knowledge as justified true belief had already been questioned in a general way by the work of Wittgenstein. Gettier provides several examples of beliefs that are both true and justified, but that we should not intuitively term knowledge. Gettier, "Is Justified True Belief Knowledge?" Analysis, Vol. 23, pp. ./cache/en-wikipedia-org-5402.html ./txt/en-wikipedia-org-5402.txt