Full Idea
Gilbert Harman introduced the term 'inference to the best explanation', and argued that it is the core notion of epistemology.
Gist of Idea
Best Explanation is the core notion of epistemology
Source
report of Gilbert Harman (The Inference to the Best Explanation [1974]) by J.J.C. Smart - Explanation - Opening Address p. 01
Book Reference
'Explanation and Its Limits', ed/tr. Knowles,Dudley [CUP 1990], p.1
A Reaction
Hard to assess that, but it sounds right. I'm a fan of coherence theories of justification, and also coherence theories of explanation, and there is a neat package there somewhere.