Full Idea
Unlike principles of crude charity, sophisticated principles of charity call for imputations of error in the subject if he has lived in deceptive conditions.
Gist of Idea
A sophisticated principle of charity sometimes imputes error as well as truth
Source
David Lewis (New work for a theory of universals [1983], 'Cont of L')
Book Reference
'Properties', ed/tr. Mellor,D.H. /Oliver,A [OUP 1997], p.224
A Reaction
This begs lots of questions about how you decide conditions are 'deceptive' if you have not yet embarked on your radical interpretation of the subject. Davidson's point still stands, that imputing truth must be the normal procedure.