My point isn't that he didn't exist, or that he wasn't a human. But I am saying, if you utilize the methods through which it is determined that no "me' or "mine" is inherently existent, and you apply that to the fellow called Sakyamuni, then "ultimately" he didn't have any "me" or "mine" either, thus no teachings can be said to have been "his". But in the ordinary sense, of course he was the Buddha and he taught the Dhamma.