Well let's see. If "surveys, facsimile drawings and Vyse's private field notes" (see above) are not classed as "HARD EVIDENCE" then I don't know what is.
That's what mates down at the pub would call having a soft cock.
The hard evidence to which I am referring is the public tabling of the chemical analysis of the ochre from the Khufu cartouche. Not surveys. Not drawings. Not field notes.
And not a chemical analysis of graffiti which is not a sample from the Khufu cartouche.
Quite simply, such a sample would most likely prove one way or another, the legitimacy of the cartouche. Book sales may fall but at least something in the arena of truth may surface.
You need to harden up or leave the field.