Full Idea
1: Coherence and incoherence are symmetrical between pairs of propositions.
Gist of Idea
1: Coherence is a symmetrical relation between two propositions
Source
report of Paul Thagard (Explanatory Coherence [1989], 1) by J.J.C. Smart - Explanation - Opening Address p.04
Book Reference
'Explanation and Its Limits', ed/tr. Knowles,Dudley [CUP 1990], p.4