There are many variations on this phrase, but is there an original source which inspired the others, or is it just a piece of popular wisdom that's emerged naturally from humanity?
Wikipedia has a page "No such thing as a stupid question", Goodreads attributes "The only stupid question is the question that is never asked" to Ramon Bautista, and a Quora user attributes there is no such thing as a stupid question" to Albert Einstein, but none of them has any good citation for an original source. Is there one?