The proximate genus locates the species in the nearest broader class. The differentia then distinguishes it within that class. “Animal” alone remains too broad. “Rational” alone supplies a differentia but omits the proximate genus. Their combination constitutes the complete ḥadd in the source’s terminology.
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Why the complete ḥadd is complete
Definitions in Logic: Complete and Incomplete Ḥadd and Rasm
The proximate genus locates the species in the nearest broader class. The differentia then distinguishes it within that class. “Animal” alone remains too broad. “Rational” alone supplies a differentia but omits the proximate genus. Their combination constitutes the complete ḥadd in the source’s terminology.