History of Philosophy Without Any Gaps HoP 180 - Proof Positive - The Logical Tradition
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Jun 16, 2014 AI Snips
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Essential Versus Descriptive Predication
- Avicenna refined syllogistic logic by distinguishing essential predication from predication under a description.
- He clarified that predicates like 'laughs' apply to a species if some members at some time perform the action.
Mental Existence Versus Concrete Reality
- Later logicians kept Avicenna's essential/descriptive distinction but introduced mental vs concrete existence.
- Al-Katibi held that predications can be true in mental existence even if no concrete instances exist.
Eternity Doesn't Imply Necessity
- Fahr al-Din al-Razi separated eternity from necessity using Avicennian ideas and theological concerns.
- He argued eternal things remain contingent on God's will, not necessarily necessary in themselves.