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Full Idea
The objection to Fair's view that the direction of causation is the direction of the transference of energy and/or momentum is that the concept of transference itself involves the idea of causation.
Gist of Idea
If direction of causation is just direction of energy transfer, that seems to involve causation
Source
E Sosa / M Tooley (Introduction to 'Causation' [1993], §1)
Book Ref
'Causation', ed/tr. Sosa,E. /Tooley,M. [OUP 1993], p.4
A Reaction
Does it? If a particle proceeds from a to b, how is that causation? ...But the problem is that the particle kicks open the door when it arrives (i.e. makes changes). We wouldn't call it causation if the transference didn't change any properties.