It may be obvious, but as a relative HN long timer, I've been hit too many times with the "source please" when making statements based on what I thought were ob

It may be obvious, but as a relative HN long timer, I've been hit too many times with the "source please" when making statements based on what I thought were obvious well known things, so studies like these are ammo for those sticklers who insist on seeing the sauce for everything.