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I see philosophy as a fairly abstract activity, as concerned mainly with the analysis of criticism and concepts, and of course most usefully of scientific concepts.

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More quotes by A. J. Ayer

The criterion which we use to test the genuineness of apparent statements of fact is the criterion of verifiability.

Language, Truth, and Logic (1936)

"I exist" does not follow from "there is a thought now."

Language, Truth, and Logic (1936)

No moral system can rest solely on authority.

Humanist Outlook (1968)

The principles of logic and mathematics are true simply because we never allow them to be anything else.

Language, Truth, and Logic (1936)

The traditional disputes of philosophers are, for the most part, as unwarranted as they are unfruitful.

Language, Truth, and Logic (1936)

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