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Inverse View
It is not the case that Motion, under strict relationism, exists only as a relative difference among bodies rather than as an individual, determinate property of each body.
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Reasons For
2 perspectives
Reason for 1 of 2
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1.
Newton's rotating bucket argument demonstrates that concave water-surface curvature persists even when no relative motion between water and bucket exists.
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2.
If motion were purely relational, no mechanical effect could distinguish absolute rotation from rest, yet centrifugal effects empirically appear.
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3.
Therefore, at least some motions must be grounded in something beyond pairwise body-relations, undermining strict relationism's completeness.
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Reason for 2 of 2
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1.
Leibniz's own dynamics required attributing living force (vis viva) intrinsically to individual bodies, not merely to body-pairs in relation.
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2.
A quantity that is conserved within a single body across interactions cannot be coherently defined as a purely relational difference between bodies.
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3.
Strict relationism thus conflicts with the very dynamical framework its most sophisticated early defender used to ground physical explanation.
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Reasons Against
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Reason against
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1.
According to the relational theory, space, time, and motion are just relations among bodies and not separately existing entities or properties independent of material bodies.
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2.
All that really exists is a difference in relative speed, velocity, and acceleration among bodies, not individual speed properties possessed by each body.
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