Full Idea
Commonsense realism has to account for the subjective similarity of the genuine perception of a green surface and the experience of, say, an after-image.
Gist of Idea
Commonsense realism must account for the similarity of genuine perceptions and known illusions
Source
Michael Lockwood (Mind, Brain and the Quantum [1989], p.142)
Book Reference
Lockwood,Michael: 'Mind,Brain and the Quantum:The Compound 'I'' [Blackwell 1991], p.142