Full Idea
The question whether something which appears as datum should remain as accepted fact is one which is not even partially determined by its origin as datum.
Gist of Idea
It is not clear from the nature of sense data whether we should accept them as facts
Source
Jonathan Dancy (Intro to Contemporary Epistemology [1985], 8.5)
Book Reference
Dancy,Jonathan: 'Introduction to Contemporary Epistemology' [Blackwell 1985], p.123