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Full Idea
With few, if any, exceptions, the fundamental properties of physical theory are dispositional properties of the things that have them.
Clarification
'Dispositions' are tendencies to behave in a certain way
Gist of Idea
Nearly all fundamental properties of physics are dispositional
Source
Brian Ellis (The Philosophy of Nature: new essentialism [2002], Ch.3)
Book Ref
Ellis,Brian: 'The Philosophy of Nature: new essentialism' [Acumen 2002], p.47
A Reaction
He is denying that they are passive (as Locke saw primary qualities), and says they are actively causal, or else capacities or propensities. Sounds right to me.