Full Idea
It is impossible that my present belief that it will rain tomorrow is caused by its raining tomorrow.
Gist of Idea
My belief that it will rain tomorrow can't be caused by its raining tomorrow
Source
Roger Scruton (Modern Philosophy:introduction and survey [1994], 22.4)
Book Reference
Scruton,Roger: 'Modern Philosophy: introduction and survey' [Sinclair-Stevenson 1994], p.322
A Reaction
This doesn't demolish a causal account of belief. It would be very surprising if I were to believe it was going to rain tomorrow for no cause whatsoever. That would be irrational.