Understand the idea
A belief can be true without being knowledge: a guess may happen to land on the correct answer. The traditional justified-true-belief account adds a reason for believing, but Gettier-style cases show that a well-supported belief can still be accidentally true. The central issue is whether the evidence connects to the truth in the right way, not merely whether the conclusion is correct. Distinguish evaluating a conclusion from evaluating the route used to reach it. This makes the topic useful for reading news, interpreting dashboards, and challenging confident AI answers. [S01]
Worked example
A campus clock stopped at 9:10 yesterday. You glance at it at exactly 9:10 today and correctly believe the time is 9:10. Contrast that with a working, recently checked clock. The conclusion is identical, but only one route reliably tracks changing time. This is an original Gettier-style teaching example.
Where the idea stops
Philosophers disagree about the best repair: reliability, safety, virtue, and other accounts differ. The module should establish the problem without presenting one solution as settled. [S01]
Connect it
Science: credible methods versus one successful prediction.
Go deeper
Can a lucky answer be true and well supported yet still fail to count as knowledge?
Sources
Stanford Encyclopedia of Philosophy · Research reference · Date: 2026-01-21, substantive revision
Explains justified true belief, epistemic luck, and Gettier objections.
Link checked 2026-10-17 · Public webpage accessed; no specialist peer review of this brief.