Full Idea
We don't need arguments to show that if there were free will then computational accounts of the mind would be inadequate; what is needed is good evidence that there actually exists such free will in the first place.
Gist of Idea
Free will isn't evidence against a theory of thought if there is no evidence for free will
Source
Georges Rey (Contemporary Philosophy of Mind [1997], 8.6)
Book Reference
Rey,Georges: 'Contemporary Philosophy of Mind' [Blackwell 1997], p.221