I think it's past time for another Stupid Questions thread, so here we go.
This thread is for asking any questions that might seem obvious, tangential, silly or what-have-you. Please respect people trying to fix any ignorance they might have, rather than mocking that ignorance.
For being Respectable, I liked the older thread's title 'Procedural Knowledge Gaps' (1) (2). That is a narrower topic, though (but it's the topic I'm reading this thread for anyway).