It is that of increasing knowledge of empirical fact intimately combined with changing interpretations of this body of fact - hence changing general statements about it - and not least a changing a structure of the theoretical system.
I'd kiss a frog even if there was no promise of a Prince Charming popping out of it. I love frogs.
What we women need to do instead of worrying about what we don't have is...
Working with Julie Andrews is like getting hit over the head with a valentine.