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# What Is the Gettier Problem? Why Knowledge Is Trickier Than You Think
- URL: https://philocrux.com/answers/what-is-the-gettier-problem/
- Published: 2026-08-09T21:28:29.000Z
- Updated: 2026-08-09T21:28:29.000Z
- Description: The Gettier problem is a fundamental challenge to the classical definition of knowledge as justified true belief (JTB). It demonstrates, through two concise thought experiments, that a person can have a belief that is both justified and true, yet still lack knowledge, because the truth is
- Author: Philosopheasy
- Tags: Answers

The Gettier problem is a fundamental challenge to the classical definition of knowledge as justified true belief (JTB). It demonstrates, through two concise thought experiments, that a person can have a belief that is both justified and true, yet still lack knowledge, because the truth is a matter of luck or accident. This refutation, advanced by Edmund Gettier in 1963, forced philosophy to search for a fourth condition that could turn true belief into genuine knowledge.

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