Bodies in motion will remain in motion and bodies at rest... — Carmelics

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Bodies in motion will remain in motion and bodies at rest will remain at rest, without need of external explanation.

Causation Modality & Possibility

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1 reason for

2 reasons against

Reasons For

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Reason for

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1.Rest and motion are opposite or contrary states.
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2.According to the Scholastic principle, opposite states cannot transform into one another by their own nature.
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3.Therefore, a body cannot move toward its opposite state (rest or motion) by virtue of its own nature.
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Reasons Against

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Reason against 1 of 2

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1.For Aristotle, rest is not a state requiring explanation only when it is the natural place of a body, not as a universal default condition.
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2.Violent motion and rest away from natural place require continuous causal sustenance, so persistence of non-natural states demands ongoing external explanation.
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3.The Cartesian claim illicitly universalizes a principle that holds only for bodies already in their natural place, smuggling in a non-Aristotelian ontology of place.
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Reason against 2 of 2

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