Best remembered for Language, Truth and Logic
(1936) which introduced British and American readers to the logical positivism of the Vienna Circle, Ayers remains a major contributor to philosophy.
According to Ayer, philosophy is an activity of analysis, not a means to truth. First principles and metaphysical truths can neither be established or denied byphilosophical enquiry. He tried to prove that verifibility (whether a proposition can be shown to be true or false) was the key principle of philosophical methodology.