Ayer, Alfred Jules

"Phenomenalism reduces physical objects to sensory experiences."

"The mind-body problem is ultimately a pseudo-problem."

"Necessity is a feature of language, not of the world."

"We must be suspicious of all a priori claims to knowledge."

"The criterion of meaningfulness determines all philosophical discourse."

"Probability is relative frequency, not metaphysical possibility."

"Universal statements cannot be conclusively verified by experience."

"Causation is regularities in nature, not mysterious forces."

"Definition reveals conceptual connections, not hidden essences."

"The self is nothing over and above its constituent experiences."

"Time may be unreal in the way metaphysicians conceive it."

"We must distinguish between questions and pseudo-questions."

"Induction is justified by pragmatic necessity, not logical proof."

"Memory provides the primary evidence for the external world."

"Beauty is simply that which pleases the aesthetic sense."

"We mistake linguistic confusion for profound philosophical puzzles."

"The existence of God is neither provable nor disprovable."

"Conventionalism explains the necessity found in logic and mathematics."

"The problem of free will dissolves under logical analysis."

"We cannot meaningfully speak of what lies beyond experience."

"Facts are not moral properties but states of affairs."

"Personal identity is constituted by psychological continuity."

"The uniformity of nature cannot be rationally justified."

"Perception provides direct access to sensible facts."

"We achieve knowledge through logical analysis and empirical observation."

"Metaphysical realism creates more problems than it solves."

"The verification principle is the gate-keeper of meaning."

"Logical truths are conventions expressing structural relationships."

"We mistake the limits of language for the limits of reality."

"Nominalism provides the most economical metaphysical framework."