Full Idea
In reasoning you try among other things to increase the explanatory coherence of your view.
Gist of Idea
Reasoning aims at increasing explanatory coherence
Source
Gilbert Harman ((Nonsolipsistic) Conceptual Role Semantics [1987], 12.2.2)
Book Reference
Harman,Gilbert: 'Reasoning Meaning and Mind' [OUP 1999], p.212
A Reaction
Harman is a champion of inference to the best explanation (abduction), and I agree with him. I think this idea extends to give us a view of justification as coherence, and that extends from inner individual coherence to socially extended coherence.