Full Idea
According to Goldman's early causal theory of knowledge, my belief that p counts as knowledge if and only if it is caused by the fact that p. This is sufficient as well as necessary, and so does not involve justification.
Gist of Idea
In the causal theory of knowledge the facts must cause the belief
Source
Michael Williams (Problems of Knowledge [2001], Ch. 2)
Book Reference
Williams,Michael: 'Problems of Knowledge' [OUP 2001], p.29
A Reaction
I take his theory simply to be false because what causes a belief is not what justifies it. I expect my mother to ring; the phone rings; I 'know' it is my mother (and it is), because I strongly expect it.