An additional teaching comparison traces more distant distinctions: human and stone are both bodies, but human is classified as growing while stone is not. Human and tree both grow; human and horse are both growing and sentient. For the direct human-animal distinction the source then uses rational. Always check the level at which the distinction operates.
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Growth as an even more remote distinction
Proximate and Remote Genus and Differentia
An additional teaching comparison traces more distant distinctions: human and stone are both bodies, but human is classified as growing while stone is not. Human and tree both grow; human and horse are both growing and sentient. For the direct human-animal distinction the source then uses rational. Always check the level at which the distinction operates.