Edmund Gettier, author of Is Justified True Belief Knowledge?, poses a problem to the contemporary epistemologist: he objects that knowledge is not justified true belief. His problem has left philosophers either to develop further criteria for knowledge or to defend the traditional definition of knowledge—justified true belief.
"Reliabilism: A Response to the Gettier Problem,"
Colgate Academic Review: Vol. 2
, Article 8.
Available at: http://commons.colgate.edu/car/vol2/iss1/8