Full Idea
A scientific theory is progressively approximating the truth if it increases its explanatory coherence by broadening to more phenomena and deepening by investigating layers of mechanisms.
Gist of Idea
Verisimilitude comes from including more phenomena, and revealing what underlies
Source
Paul Thagard (Coherence: The Price is Right [2012], p.46)
Book Reference
-: 'Southern Journal of Philosophy' [-], p.46