In case you (or others) weren't aware, this is a relatively common way to study and has a name, the Socratic method: https://en.wikipedia.org/wiki/Socratic_method
But, I'm not convinced about "common". I've had several highly educated people, from top tier universities, outright offended that I would guess about anything, rather than go straight to the literature. But, they were also no fun.
So it's possible you mentioning it got their haunches up