- Ayer accepts the a priori/a posteriori division emphasised by David Hume and Emmanuel Kant
- Ayer follows both Hume and thinkers of the Vienna Circle in their rejection of Metaphysics, First chapter in his book Language, Truth and Logic is entitled 'elimination of Meatphysics'
- Ayer - 'for a statement to be true it must be a tautology (a priori) or verifiable in principle (a posteriori)
- However Ayer focuses on the criteria of statments that are verifiable in principle
- Language, Truth and Logic -Criterion of of verifiability; 'The criterion which we use to test the genuiness of apparent statements of fact...'
- Above quote shows the key difference between the verification principle taught by Ayer and that of the Vienna Circle
- Ayer's principle suggests we do not need to conclusively prove something by a direct observation, we need to suggest how it could possibly be proven/verified for a statment to be…
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