Full Idea
Empirical foundationists must decide whether knowledge ultimately rests on either beliefs or judgements about experience, or on the experiences or sensations themselves.
Gist of Idea
Are empirical foundations judgements or experiences?
Source
Michael Williams (Problems of Knowledge [2001], Ch. 8)
Book Reference
Williams,Michael: 'Problems of Knowledge' [OUP 2001], p.96
A Reaction
This clarifies the key issue very nicely, and I firmly vote for the former option. The simplest point is that error is possible about what sensations are taken to be of, so they won't do on their own.