Concept
Can a set be extensional or intensional?
Stephen Davies, Ph.D. Version 2.2.2 Through Discrete Mathematics A Cool Brisk Walk / Chapter 1
"33. Is A an extensional set, or an intensional set? The question doesn’t make sense. Sets aren’t “extensional” or “inten- sional”; rather, a given set can be described extensionally or intensionally. The description given in item 19 is an extensional one; an intensional description of the same set would be “The Shakespeare tragedies Stephen studied in high school.”"
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