1-2g New theory is constrained in terms of what it can say, since it must either be consistent with existing theories, or contradict them but address the problems thereby raised

1-2d You have to know your problem-situation (and your web of ideas) as best as you can to judge the merit of new explanations
5-1b1a1 Improving on already existent technology by removing one of its restraints amounts to innovation
3-1d6 Constraints in the form of consistent style leave space for creativity and progress

1-2g1 Einstein - ‘No fairer destiny for any physical theory than that it should point the way to a more comprehensive theory in which it lives on as a limiting case.‘

1-2h A good explanation makes it harder to fool yourself
9-1a2 Most fairly good ideas are adjacent to even better ones

New theory is constrained in terms of what they can say, since it must either be consistent with existing theories, or contradict them but address the problems thereby raised. In short, new theories have to solve more problems than existent ones.

9-1a1 People who converge upon the truth converge with each other

BorrowedCreativity