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Quote: classes are abstract entities, universals, but not aggregates or collections; e.g., a heap of stones is not a class, What is its size?
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Topic:
abstraction
Group:
sets
Topic:
set definition by extension or intension
Quotation Skeleton
The fact that classes are universals, or abstract … class of stones, say, to a heap of … up; but the class of stone in the … token another class could be identified with the … have to be kept distinct; for we want … Classes, therefore, are abstract entities; we may call … classes. Google-1 Google-2
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Topic: abstraction (62 items)
Group: sets (7 topics, 148 quotes)
Topic: set definition by extension or intension (18 items)