Full Idea
We are only justified in regarding scientific practice as the very paradigm of rationality if we can justify the claim that scientific change is rationally explicable.
Gist of Idea
For science to be rational, we must explain scientific change rationally
Source
W.H. Newton-Smith (The Rationality of Science [1981], I.2)
Book Reference
Newton-Smith,W.H.: 'The Rationality of Science' [RKP 1981], p.3