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Ideas for 'What is Logic?st1=Ian Hacking', 'Languages of Art (2nd edn)' and 'Protagoras'

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2 ideas

2. Reason / B. Laws of Thought / 4. Contraries
Only one thing can be contrary to something [Plato]
2. Reason / D. Definition / 3. Types of Definition
A decent modern definition should always imply a semantics [Hacking]