The verification principle
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Question
The verification principle?
Answer
A sentence is literally meaningful only if it is analytic (true by definition) or verifiable (checkable by experience).
Question
Analytic statement?
Answer
True just from the meanings of its words (e.g. 'all bachelors are unmarried'); says nothing new about the world.
Question
Verifiable statement?
Answer
Meaningful because some possible experience could confirm it or count against it — you could, in principle, check it.
Question
Meaningful vs true — Ayer's order?
Answer
First ask if a sentence is meaningful (says anything at all); only then can it be true or false.
Question
Why 'meaningless' not 'false'?
Answer
A sentence that passes neither door makes no real claim, so there's nothing there to be true or false.
Question
Logical positivism?
Answer
The view that real knowledge comes only from logic/definition or from testing against experience — nothing else.
Question
The weak version of the test (Go further)?
Answer
A claim is meaningful if some experience makes it more or less likely — not only if it can be conclusively proved.
Question
Ayer's roots?
Answer
Hume's split (relations of ideas vs matters of fact) → Vienna Circle → Ayer's single analytic-OR-verifiable test.
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Topic 10.1 hub
Language, Truth and Logic — Ayer
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