There absolutely was a cornucopia in the fruit of the loom logo. That is the sole reason I know what a cornucopia is. It wasn't on any table or in any thanksgiving decoration in my childhood, it isn't a popular thing to exist in media, it was an obscure item that was a main part of an underwear logo.
Anyone that says differently is objectively wrong. I don't know why the logo changed and why besides a patent entry even the company itself denies it. I don't really care if this is an alternate earth or aliens or time travellers or an entirely natural quirk of existing in a quantum universe, but I know for an absolute fact the sole reason I know what a cornucopia is is because of my underwear, and not because my dick is coincidentally called the horn of plenty.