Full Idea
Our thoughts have a kind of duality, corresponding to their surface appearance to introspection and their underlying logical reality.
Gist of Idea
Thoughts have a dual aspect: as they seem to introspection, and their underlying logical reality
Source
Colin McGinn (The Mysterious Flame [1999], p.147)
Book Reference
McGinn,Colin: 'The Mysterious Flame' [Basic Books 1999], p.147