Like Keygrip (who made some extremely good points in my opinion) I am very used to being asked what I consider stupid questions by licenced pilots (bigfoot at no time in this rant am I having a go at you, so don't take offence). All of which should have been covered in their training, or atleast they should have been taught where to look for the answers.
None of us can be expected to know the minutiae of flying at any given second, however, we should have been taught how to find the answer to any questions we might have.
Most of the members and students at the clubs I've taught at have ended up getting annoyed with me as I won't answer a straight question. I'll always make them look for the answer. That way, they might remember it. If I've just blathered it out, I guarantee that 20 minutes later they've forgotten it.
Every PPL should have a current copy of LASORS etc. and should know how to navigate it. Anyone over the age of 5 can read it, if you still have questions, then people like Bose, Keygrip or myself will be happy to explain it fully. CAA documents do sometimes need a bit of translation and if you've bothered yourself to have a go, then we're certainly happy enough to fill in the blanks.
There is no excuse for not knowing much of this stuff, afterall, just because you don't know the highway code doesn't exempt you from breaking traffic rules. Ignorance of the law is no excuse! So use a small amount of commonsense and read up on the basics.
If I had £1 for each time I've explained SEP revalidation to a PPL holder, I'd be alot wealthier than I am!