Full Idea
2: If a set of propositions explains a further proposition, then each proposition in the set coheres with that proposition, and propositions in the set cohere pairwise with one another.
Gist of Idea
2: An explanation must wholly cohere internally, and with the new fact
Source
report of Paul Thagard (Explanatory Coherence [1989], 2) by J.J.C. Smart - Explanation - Opening Address p.04
Book Reference
'Explanation and Its Limits', ed/tr. Knowles,Dudley [CUP 1990], p.4