> Until this is known one cannot say that the abscence of Khufu's
> name on his sarcophagus is unambiguous evidence for his pyramid
> not being a tomb.
The Pyramid Texts are gobblety gook according to the Egyptologists who parse them. Not one single useful bit of information has ever come out of them because these are just spells and incantations to get the king into heaven. 150 years of intense study of this corpus has yet to even be able to identify the tenets of the religion. Did one use a fzzt-sceptre to seal the crypt or a drt-ring? Indeed, there are no crypt or tombs in the PT because it says the tomb of the king is in the sky.
So what part of the PT are you interpreting to mean the sarcophagus might or might not be decorated.
To date no interpretation of the PT has yielded any information at all. No interpretation can even shed light on the duat, the ankh, or any burial practices of any nature as it applies to the king (ironically it does say men are buried). No two Egyptologist even agree on the meaning of the Eye of Horus which is the very fountainhead of the Egyptian beliefs.
You can't use an interpretation the PT to make or address any point and I'd like to see you try.