Equality: both classes include exactly the same individuals. Disjointness: no individual is shared. Absolute inclusion: the narrower class is entirely inside the broader class, with additional members of the broader class. Partial overlap: shared members plus members unique to each class. The four textbook anchors are human/rational, human/horse, animal/human, and animal/white.
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Final review: one decisive test each
Four Relations Between Universal Concepts
Equality: both classes include exactly the same individuals. Disjointness: no individual is shared. Absolute inclusion: the narrower class is entirely inside the broader class, with additional members of the broader class. Partial overlap: shared members plus members unique to each class. The four textbook anchors are human/rational, human/horse, animal/human, and animal/white.