Belief is a logically necessary condition for propositional knowledge defined as justified true belief.

the verdict

SUPPORTED

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2 sources for · 0 against

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AS REPORTEDno primary record reached; this is what the reporting says

Is it true that belief is a logically necessary condition for propositional knowledge defined as justified true belief?

Yes. Standard epistemological definitions and philosophical literature confirm that propositional knowledge, traditionally analyzed as justified true belief (JTB), requires belief as a necessary condition.

Verdict: SUPPORTED · 2 sources for, 0 against · Last checked 4 Aug 2026

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Evidence for · 2

Wikipedia: Gettier problem

Reference article covering this claim directly

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Wikipedia: Gettier problem. (n.d.). Wikipedia. https://en.wikipedia.org/wiki/Gettier_problem

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More for · 1

Stanford Encyclopedia of Philosophy: Belief

Notes that contemporary philosophy takes propositional knowledge to be a species of justified true belief.

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Stanford Encyclopedia of Philosophy: Belief. (n.d.). Stanford Encyclopedia of Philosophy. https://plato.stanford.edu/entries/belief/

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first checked04 Aug 2026

judged → SUPPORTED · 7504 Aug 2026

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