Consider student and athlete in a setting where there is a student athlete, a student who is not an athlete, and an athlete who is not a student. All three regions exist, so the relation is partial overlap. This additional everyday example applies the book’s three-region criterion.
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A new worked example: student and athlete
Four Relations Between Universal Concepts
Consider student and athlete in a setting where there is a student athlete, a student who is not an athlete, and an athlete who is not a student. All three regions exist, so the relation is partial overlap. This additional everyday example applies the book’s three-region criterion.