A. J. Ayer Quotes

But if science may be said to be blind without philosophy, it is true also that philosophy is virtually empty without science.

It appears, then, that ethics, as a branch of knowledge, is nothing more than a department of psychology and sociology.

Sentences which simply express moral judgements do not say anything. They are pure expressions of feeling and as such do not come under the category of truth and falsehood.

The criterion which we use to test the genuineness of apparent statements of fact is the criterion of verifiability.We say that a sentence is factually significant to any given person, if, and only if, he knows how to verify the proposition which it purports to express— that is, if he knows what observations would lead him, under certain conditions, to accept the proposition as being true, or reject it as being false.

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