Full Idea
Some tasks (playing the piano, speaking foreign languages, playing fast sports) are best performed when the agent is largely unconscious of the details.
Gist of Idea
Some activities are performed better without consciousness of them
Source
Fred Dretske (Naturalizing the Mind [1997], Ch.4 n16)
Book Reference
Dretske,Fred: 'Naturalizing the Mind' [MIT 1997], p.182
A Reaction
A significant point, but it supports the evolutionary view, which is that what matters is success, and consciousness will switch on or off, whichever promotes the activity best.