Originally Posted by PaulB
I must say that I can't see that what you suggest is implied by that question. Isn't Adam simply saying (or perhaps implying) that the question is one among several that will receive a definitive answer in the book.
I must say I didn't think it was Adam's words - I thought he was reproducing a summary of the book from the publishers.
I've seen the exact same question asked on these boards to suggest that because no-one has been able to prove who forged it (and when and how) that this strongly suggests the diary is genuine. I feel very confident that this is exactly what is being suggested here too. I'm fairly sure it's a rhetorical question.