Language, Truth and Logic — Ayer

A sentence is literally meaningful only if it is analytic (true by definition) or verifiable (checkable by experience).

True just from the meanings of its words (e.g. 'all bachelors are unmarried'); says nothing new about the world.

Meaningful because some possible experience could confirm it or count against it — you could, in principle, check it.

First ask if a sentence is meaningful (says anything at all); only then can it be true or false.

A sentence that passes neither door makes no real claim, so there's nothing there to be true or false.

The view that real knowledge comes only from logic/definition or from testing against experience — nothing else.

A claim is meaningful if some experience makes it more or less likely — not only if it can be conclusively proved.

Hume's split (relations of ideas vs matters of fact) → Vienna Circle → Ayer's single analytic-OR-verifiable test.

Claims about a reality beyond all possible experience — God, the soul, an ultimate reality behind the world.

It's not true by definition and no possible experience could confirm or count against it — so it fits neither door.

A metaphysical sentence makes no checkable claim, so there's nothing there to be true or false in the first place.

No — if 'God exists' is meaningless, so is 'God does not exist'; he's neither believer nor atheist.

Religious sentences state no facts, so they are neither true nor false — the factual debate is empty.

Neither analytic nor verifiable → literally meaningless. The same reasoning applies to every claim about a hidden reality.

He doesn't answer questions like the problem of evil — he says they never get started, because 'God exists' is empty.

It removes the factual CLAIMS; feelings and attitudes may remain, but they state no facts on either side.

The view that moral sentences don't state facts — they express the speaker's feelings and try to influence others.

Expresses disapproval ('stealing — boo!') and nudges the listener to feel the same; it adds no factual content.

No — they state no fact, so there's nothing there to be true or false.

Emotivism says a moral sentence EXPRESSES a feeling (like a wince), not REPORTS it ('I dislike stealing' would be a checkable fact).

Once the facts of an act are listed, no 'wrongness' fact remains to check — so moral talk can't be factual.

No — our attitudes drive how we live; Ayer's narrower claim is only that moral talk has no factual content.

The wider view that value-talk isn't in the business of stating knowable facts; emotivism is one version.

If I say 'boo!' and you 'hooray!', do we even disagree, or just feel differently? Emotivism struggles to keep moral 'mistakes'.

Test the reasoning of a claim — weigh reasons for and against — and reach a reasoned judgement.

The verification principle is itself neither analytic nor verifiable, so by its own rule it comes out meaningless.

Treat the principle as a chosen definition of 'meaningful' — this dodges self-refutation but drains its force to condemn religion or ethics.

Strong (conclusive proof) rejects science too; weak (some experience makes it likelier) leaks and lets metaphysics back in.

The demand that factual claims be testable and the analytic/verifiable distinction largely hold; the sweeping 'meaningless' verdicts wobble.

Open-book, one hour: a two-part question on your text — (a) Explain a concept [10] + (b) Evaluate a claim [15].

Don't copy long quotes — use the text to SUPPORT understanding and argument; do the right job in each part.

Explain the claim, argue for it, raise the objection, weigh them, and conclude with a reason tied to the text.