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Function / Place / (s): No double function: a thing cannot at the same have the categorical property (as a function) of sharpness and the disp. property (as a function) of the ability to cut - ((s) at least no "double explanation" no "double yield"?) - Example: if the arrangement of the molecules of opium contitutes the cat. aspect of the binding of these atoms, it can not simultaneously have the cat. aspect of the soporific effect - there does not seem to enough categorical to supply all reactants with their disp. property.
AR II = Disp
D. M. Armstrong
Dispositions, Tim Crane, London New York 1996
What is a Law of Nature? Cambridge 1983