The graffiti is contemporary with the construction of the GP, and because it gives the name of Khnum-Khufu, then it must be contemporary with the reign of Khufu. This is evidence of the first kind, and the theories. supicions etc.. dished out by Sitchin, Alford et al. must be discarded.
Graham Hancock did the right thing. He went to see the Graffiti for himself, examined it, and agreed with the above conclusion.
PS: I was not with Hancock at that time. Nor was I at the Alaska conference when the alledged 'deal' was made. I was ill and could not travel. As a matter of fact, I have never been in the relief chambers and have not seen the graffiti first hand. But the images I saw on RAI, and of course the account of GH, convinces me that they are contemporary with the construction of the GP.