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

— A. J. Ayer Language, Truth, and Logic (1936)

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More quotes by A. J. Ayer

"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)

The ground for taking ignorance to be restrictive of freedom is that it causes people to make choices which they would not have made if they had seen what the realization of their choices involved.

The Meaning of Life and Other Essays (1990)

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