19382
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Abstracta are abbreviated ways of talking; there are just substances, and truths about them [Leibniz]
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Full Idea:
I consider abstracta not as real things but as abbreviated ways of talking ...and to that extent I am a nominalist, at least provisionally ...It suffices to posit only substances as real things, and, to assert truths about these.
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From:
Gottfried Leibniz (On the Reality of Accidents [1688]), quoted by Richard T.W. Arthur - Leibniz
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A reaction:
I am a modern nominalist, in my hostility to a serious ontological commitment to abstracta. You get into trouble, though, if you say there are only objects or substances. Physics says reality may all be 'fields', or something.... 'Truths' is good.
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3159
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Beliefs and desires aren't real; they are prediction techniques [Dennett]
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Full Idea:
Intentional systems don't really have beliefs and desires, but one can explain and predict their behaviour by ascribing beliefs and desires to them. This strategy is pragmatic, not right or wrong.
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From:
Daniel C. Dennett (Brainstorms:Essays on Mind and Psychology [1978], p.7?)
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A reaction:
If the ascription of beliefs and desires explains behaviour, then that is good grounds for thinking they might be real features of the brain, and even if that is not so, they are real enough as abstractions from brain events, like the 'economic climate'.
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