Assumptions are so hard to identify. They only seem to become evident when they run into one another.
I’m starting to think of assumptions as something like subatomic particles. You know they’re out there, and you’ve got a pretty good idea of what they are, but you can’t really see them clearly enough to prove what they are until you get something worked up with a lot of energy and ram it into something else in such a way as to create an underground explosion at high cost to the government.