The result is - document destruction - we're really not going to be able to prove beyond a truth the negatives and some of the positive conclusions that we're going to come to. There will be always unresolved ambiguity here.
I think the trick with knowledge is to acquire it, and forget all except the perfume - because it is noisy and sometimes drowns out one's own brain voices. The perfume part is important because it will help find the knowledge again to help get to the destinations the inner urges pick.