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Full Idea
Spatial, temporal and numerical relations can have various causal roles without themselves being instances of causal powers.
Gist of Idea
Spatial, temporal and numerical relations have causal roles, without being causal
Source
Brian Ellis (The Metaphysics of Scientific Realism [2009], 3)
Book Ref
Ellis,Brian: 'The Metaphysics of Scientific Realism' [Acument 2009], p.70
A Reaction
He cites gaps, aggregates, orientations, approaching and receding, as examples of categorical properties which make a causal difference. I would have thought these could be incorporated in accounts of more basic causal powers.