In this classical logical setting, natiq does not mean merely producing speech sounds. It denotes the human capacity for rational understanding and thought.
An infant may not yet speak clearly and still belongs to the human species.
A person unable to speak physically also remains human.
Do not replace this technical meaning with ordinary audible speech.
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What rational (natiq) means
The Five Universals: Genus, Species, Differentia, Property, Common Accident
In this classical logical setting, natiq does not mean merely producing speech sounds. It denotes the human capacity for rational understanding and thought.
An infant may not yet speak clearly and still belongs to the human species.
A person unable to speak physically also remains human.
Do not replace this technical meaning with ordinary audible speech.