IDEA FOUND // IDEA 80
The Gettier Problem
“A well-supported belief can be true only by accident.”
01 / PLAINLY
What it means, plainly
The Gettier problem presents cases where a belief is true and appears justified, yet reaches the truth through luck.
02 / CONTEXT
A little more
Gettier cases challenge the definition of knowledge as justified true belief. The justification seems connected to the truth in a way that leaves too much epistemic luck.
03 / WHY IT MATTERS
Why it matters
It shows that being correct is not always the same as knowing; the connection between belief and truth also matters.
04 / EXAMPLE
A familiar example
You glance at a stopped clock at exactly the time it displays and form a true belief without knowing the mechanism failed.
05 / LIMIT
What it does not mean
The problem proves neither that knowledge is impossible nor that one accepted repair exists.
06 / NOTICE
Notice it in your day
Use the stopped-clock example. List the belief, its support, why it is true, and the exact point where luck enters.
FINAL NOTE
The idea worth keeping
Beyond support and truth, ask whether the belief arrived at truth through a reliable connection.
QUESTIONS / 02
Questions people still have
Which familiar definition do Gettier cases challenge?
They challenge the idea that knowledge is simply justified true belief.
Does a stopped clock deliver the correct time through a reliable route?
No. Its reading matches by chance even though the belief happens to be true.