> If you pass an earlier test while missing some fundamental concept, then you'll simply spend the time learning it when you do need it. Only if one knows what

> If you pass an earlier test while missing some fundamental concept, then you'll simply spend the time learning it when you do need it. Only if one knows what they don't know. And fundamental concepts have a habit of hiding in plain sight. It's easy to waste lots of resources because one doesn't know about a fundamental concept.