Ayer, Alfred Jules

"Phenomenology cannot be a foundation for knowledge; only empiricism can be."

"The debate between realism and idealism obscures rather than clarifies our situation."

"Conventional wisdom often reflects linguistic confusion rather than genuine insight."

"Moral progress is possible, but it comes from changing attitudes, not discovering facts."

"The verification criterion is radical but necessary for clarity in thought."

"Forms and essences exist only in language; the world contains only particulars."

"To think clearly is to use language precisely and consistently."

"The problems of philosophy dissolve when we cease asking what cannot be asked."

"Experience is structured by the categories we impose, not found already structured."

"Certainty in the empirical world is not achievable; only probability is."

"The so-called ineffable cannot be spoken of, even indirectly or by analogy."

"Logical truths tell us nothing about the world; they tell us about our language."

"To understand a concept is to understand its use in the language-game."

"The confusion between sense and reference generates many philosophical puzzles."

"Meaning is not intrinsic to words but arises from social convention and use."

"The principle of verifiability is not itself a statement of fact."

"Metaphysics is a form of poetry rather than science."

"We are not concerned with the fact that sentences of a metaphysical appearance are historically important."

"The traditional dispute between realists and their opponents is unreal."

"A proposition is a tautology if it is analytic and true."

"Empiricism remains the only defensible approach to knowledge."

"The meaning of a statement is the method of its verification."

"Ethical judgments are expressions of attitude, not factual claims."

"We cannot justify our beliefs through infinite regression or circularity."

"The verification principle itself cannot be empirically verified."

"Language and reality must maintain a strict correspondence."

"Logical positivism sought to eliminate meaningless speculation."

"The atomic facts of the world correspond to elementary propositions."

"Esthetic judgments are subjective expressions of personal preference."

"Religious language is neither true nor false but emotionally expressive."