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By N. Rescher. Author N. Rescher. Basic Modal Relations. Rules for Contradictories. Conversion (i.e., Simple Conversion). C-Conversion (Conversion by Contradiction). Modal Syllogisms. Avicenna as the Source of al-Qazw?.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.