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QuoteRef: quinWV_1969
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Topic:
classification
Group:
sets
Topic:
set definition by extension or intension
Reference
Quine, W. van O., Set Theory and Its Logic, Cambridge, Massachusetts, Harvard University Press, 1963, 1969. Google
1 ;;Quote: sets are classes; the notion of class is so fundamental to thought that we cannot hope to define it
1 ;;Quote: an open (parameterized) sentence defines a class of things for which the sentence is true; but not required for classes
ThesaHelp: references p-r (245 items)
Topic: classification (64 items)
Group: sets (7 topics, 148 quotes)
Topic: set definition by extension or intension (18 items)