18089
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Dispositions are not general laws, but laws of the natures of individual entities [Place]
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Full Idea:
Dispositions are the substantive laws, not, as for Armstrong, of nature in general, but of the nature of individual entities whose dispositional properties they are.
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From:
Ullin T. Place (Intentionality and the Physical: reply to Mumford [1999], 6)
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A reaction:
[He notes that Nancy Cartwright 1989 agrees with him] I like this a lot. I tend to denegrate 'laws', because of their dubious ontological status, but this restores laws to the picture, in the place where they belong, in the stuff of the world.
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12709
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Motion is not absolute, but consists in relation [Leibniz]
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Full Idea:
In reality motion is not something absolute, but consists in relation.
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From:
Gottfried Leibniz (On Motion [1677], A6.4.1968), quoted by Daniel Garber - Leibniz:Body,Substance,Monad 3
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A reaction:
It is often thought that motion being relative was invented by Einstein, but Leibniz wholeheartedly embraced 'Galilean relativity', and refused to even consider any absolute concept of motion. Acceleration is a bit trickier than velocity.
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