Full Idea
The reasons for which people believe things are rarely conscious.
Gist of Idea
People's reasons for belief are rarely conscious
Source
Gilbert Harman (Thought [1973], 2.2)
Book Reference
Harman,Gilbert: 'Thought' [Princeton 1977], p.28
A Reaction
Probably correct. The interesting bit is when they bring the beliefs into consciousness and scrutinise them rationally. Philosophers routinely overthrow their natural beliefs in this way.