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IN LANGUAGE, TRUTH AND LOGIC (1936), AYER PRESENTS THE VERIFICATION PRINCIPLE AS THE ONLY VALID BASIS FOR PHILOSOPHY. UNLESS LOGICAL OR EMPIRICAL VERIFICATION IS POSSIBLE, STATEMENTS LIKE “GOD EXISTS“ OR “CHARITY IS GOOD“ ARE NOT TRUE OR UNTRUE BUT MEANINGLESS, AND MAY THUS BE EXCLUDED OR IGNORED.
ALFRED JULES AYER WAS AN ENGLISH PHILOSOPHER KNOWN FOR HIS PROMOTION OF LOGICAL POSITIVISM, PARTICULARLY IN HIS BOOKS LANGUAGE, TRUTH, AND LOGIC AND THE PROBLEM OF KNOWLEDGE.
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00:00 ALFRED JULES AYER
01:19 PHILOSOPHICAL IDEAS
03:22 LANGUAGE, TRUTH AND LOGIC / CRITERION OF MEANING
04:28 TYPES OF VERIFICATION
06:07 METAPHYSICS ATTACKED
07:42 TRUTH AS VALIDATION
08:16 VALUE JUDGMENTS / EMOTIVISM
09:23 AYER’S LATER REJECTION OF LOGICAL POSITIVISM