Rasm tāmm combines the proximate genus with a distinctive property. The textbook’s model is “laughing-capable animal” for human. Animal provides the nearest genus; laughing-capable provides the property. It is complete as a rasm, not a ḥadd, because a property replaces the essential differentia.
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Complete descriptive definition
Definitions in Logic: Complete and Incomplete Ḥadd and Rasm
Rasm tāmm combines the proximate genus with a distinctive property. The textbook’s model is “laughing-capable animal” for human. Animal provides the nearest genus; laughing-capable provides the property. It is complete as a rasm, not a ḥadd, because a property replaces the essential differentia.