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Causality / Armstrong: one may not identify causation with (natural) necessity - there are cases of necessity, which are not cases of causation - hence do not identify causal laws with natural laws.
II ~ 25
Causality / Place: modal relation - between times: categorical
AR II = Disp
D. M. Armstrong
Dispositions, Tim Crane, London New York 1996
What is a Law of Nature? Cambridge 1983