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22132
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Species and genera are individual concepts which naturally signify many individuals [William of Ockham]
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Full Idea:
In his mature nominalism, species and genera are identified with certain mental qualities called concepts or intentions of the mind. Ontologically they are individuals too, like everthing else, ...but they naturally signify many different individuals.
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From:
William of Ockham (works [1335]), quoted by Claude Panaccio - William of Ockham p.1056
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A reaction:
'Naturally' is the key word, because the concepts are not fictions, but natural responses to encountering individuals in the world. I am an Ockhamist.
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9216
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Each area of enquiry, and its source, has its own distinctive type of necessity [Fine,K]
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Full Idea:
The three sources of necessity - the identity of things, the natural order, and the normative order - have their own peculiar forms of necessity. The three main areas of human enquiry - metaphysics, science and ethics - each has its own necessity.
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From:
Kit Fine (The Varieties of Necessity [2002], 6)
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A reaction:
I would treat necessity in ethics with caution, if it is not reducible to natural or metaphysical necessity. Fine's proposal is interesting, but I did not find it convincing, especially in its view that metaphysical necessity doesn't intrude into nature.
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18884
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Abstraction is usually seen as producing universals and numbers, but it can do more [Simons]
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Full Idea:
Abstraction as a cognitive tool has been associated predominantly with the metaphysics of universals and of mathematical objects such as numbers. But it is more widely applicable beyond this standard range. I commend its judicious use.
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From:
Peter Simons (Modes of Extension: comment on Fine [2008], p.21)
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A reaction:
Personally I think our view of the world is founded on three psychological principles: abstraction, idealisation and generalisation. You can try to give them rigour, as 'equivalence classes', or 'universal quantifications', if it makes you feel better.
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9215
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Causation is easier to disrupt than logic, so metaphysics is part of nature, not vice versa [Fine,K]
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Full Idea:
It would be harder to break P-and-Q implying P than the connection between cause and effect. This difference in strictness means it is more plausible that natural necessities include metaphysical necessities, than vice versa.
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From:
Kit Fine (The Varieties of Necessity [2002], 6)
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A reaction:
I cannot see any a priori grounds for the claim that causation is more easily disrupted than logic. It seems to be based on the strategy of inferring possibilities from what can be imagined, which seems to me to lead to wild misunderstandings.
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19381
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The past has ceased to exist, and the future does not yet exist, so time does not exist [William of Ockham]
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Full Idea:
Time is composed of non-entities, because it is composed of the past which does not exist now, although it did exist, and of the future, which does not yet exist; therefore time does not exist.
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From:
William of Ockham (works [1335], 6:496), quoted by Richard T.W. Arthur - Leibniz 7 'Nominalist'
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A reaction:
I've a lot of sympathy with this! I favour Presentism, so the past is gone and the future is yet to arrive. But we have no coherent concept of a present moment of any duration to contain reality. We are just completely bogglificated by it all.
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