Believe the Internet

I’ve always known the Internet to be a rich and accurate source of information. Today it revealed something that I wasn’t aware of, or had forgotten:

I have a PhD in history.

I don’t actually recall studying for it, but according to this test, my 100% correct result came about because of my education level; that being the said PhD. As more than half the questions were about American history, I presume my thesis was related to that, or perhaps I studied in an American university. I have no recollection of either, but a perfect score is unequivocal evidence of my great intellect.

Now where did I put my certificate and my thesis?