Error 1: “Human and tree are animals”—false, because a tree is not an animal.
Error 2: Answering “rational” for human and cow—this is not common to both in the classical definition.
Error 3: Answering “white” for human and horse—color is accidental, not essential.
Test whether the proposed answer covers everything in the question and whether it is an essential, not accidental, feature.
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Diagnosing inadequate answers
Mā Huwa: Asking What a Thing Is
Error 1: “Human and tree are animals”—false, because a tree is not an animal.
Error 2: Answering “rational” for human and cow—this is not common to both in the classical definition.
Error 3: Answering “white” for human and horse—color is accidental, not essential.
Test whether the proposed answer covers everything in the question and whether it is an essential, not accidental, feature.