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14429 | Classes are logical fictions, made from defining characteristics [Russell] |
Full Idea: Classes may be regarded as logical fictions, manufactured out of defining characteristics. | |
From: Bertrand Russell (Introduction to Mathematical Philosophy [1919], II n1) | |
A reaction: I agree with this. The idea that in addition to the members there is a further object, the set containing them, is absurd. Sets are a tool for thinking about the world. |