In addition to what’s been mentioned, that there isn’t a stupid question if it’s asked seeking an actual answer, the phrase is the title of the community, not a rule. So ask anything, if it’s truly something you don’t know or aren’t sure about. Sometimes the simplest and “common knowledge” questions can spawn some interesting details that isn’t all that commonly known.
In addition to what’s been mentioned, that there isn’t a stupid question if it’s asked seeking an actual answer, the phrase is the title of the community, not a rule. So ask anything, if it’s truly something you don’t know or aren’t sure about. Sometimes the simplest and “common knowledge” questions can spawn some interesting details that isn’t all that commonly known.