[Agingcoder]

Not really.

There's 'understand', and 'believe you understand', and in other fields (say, software engineering...) you meet lots of people who think they understand, when they don't. I also think that in the SE case, because it's more 'relatable' ('look at my website') , people generally assume more easily that they understand when they don't.

Also if you look at theoretical comp sci results (calculability theory, etc) , or even complex software engineering systems (actual working distributed systems, etc) , I very much doubt that many people (apart from the people who designed and wrote them, and who may even be wrong about them! ) can _actually_ claim to understand them fully. You will understand, to some extent, the 'theorem' (ie the system), but the implementation will remain a black box.