Though the old adage may state that there is no such thing as a stupid question, a concept espoused by Kindergarten teachers and Reddit overlords alike, some asks are just really, really really, dumb.

Is water wet? Is a hot dog a sandwich? Or to [ironically] quote the girl in my eighth-grade class, “what does regret mean?” Stupidity is everywhere, a sentiment several Redditors know all too well.

From the physics of the deep end to why Earth isn't (technically) visible through a telescope, here are 20 very dumb questions people legitimately asked.