Ad hominem debate? what are you talking about, Warwick? I simply disagree with theories, as I've said before I'm not into anything personal as you suggest. Besides, if proven that Khufu built the Great Pyramid, then I'll agree with Graham Hancock, who a.) believes that Giza predates the Old Kingdom and that b.) the G.P. didn't serve the purpose of a tomb.
But I'm not yet 100 % convinced that Khufu was the builder.