Full Idea
Maybe physical effects of mental causes are always overdetermined by distinct causes (the 'belt and braces' view). Defenders say the two are still counterfactually dependent - but that would raise the question of why, if they are ontologically distinct.
Gist of Idea
Maybe mind and body do overdetermine acts, but are linked (for some reason)
Source
David Papineau (Thinking about Consciousness [2002], 1.5)
Book Reference
Papineau,David: 'Thinking about Consciousness' [OUP 2004], p.27
A Reaction
[He cites D.H. Mellor as defending 'belt and braces'] This strikes me as the sort of theory that arises from desperation: traditional dualism won't work, but we MUST keep mind separate, so that we can have free will, and save morality. All very confused!