Combining Philosophers

Ideas for H.Putnam/P.Oppenheim, William of Ockham and R Keefe / P Smith

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18. Thought / E. Abstraction / 2. Abstracta by Selection
A universal is the result of abstraction, which is only a kind of mental picturing [William of Ockham]
     Full Idea: A universal is not the result of generation, but of abstraction, which is only a kind of mental picturing.
     From: William of Ockham (Ordinatio [1320], DII Qviii prima redactio)
     A reaction: The phrase 'mental picturing' works very plausibly for the universal 'giraffe', but not so well for 'multiplication' or 'contradiction'. Though we might broaden 'picturing' to being a much less visual concept. Mapping seems basic.