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What Is the Gettier Problem? Why Knowledge Is Trickier Than You Think

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

By Philosopheasy Published on August 9, 2026

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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Moving beyond the gentrification of the mind, we provide a permanent home for the rigorous dialectical investigations necessary to navigate the 21st century.

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