Gettier problem

Etymology
Attributed to American philosopher.

Noun

 * 1)  The epistemological problem that a description of knowledge as “justified true belief” is not adequate: there are counterexamples where a person has justified true belief of something and yet does not know it to be true.

Translations

 * Finnish: Gettierin ongelma
 * German: Gettier-Problem
 * Polish: problem Gettiera