That first phase is what I call “playing around”. A necessary phase. When you explore/play one shouldn’t test because one is learning. Testing (aka evaluation)

That first phase is what I call “playing around”. A necessary phase. When you explore/play one shouldn’t test because one is learning. Testing (aka evaluation) should happen when one knows the routine + outcome you want to evaluate that routine one. Whether it’s code or improving your singing or learning in school. This generalizes to all of that, IMO