Hmmm. I admit I don't like trying to say anything like 70-90% accurate on a document either, possibly related to the first report I published where the word 'now' got mistyped as 'not' and so inverted the conclusions of the report.

But we are not talking a scientific report here: it is from a world where uncertainty and doubt is the norm. There are accurate   quotations from.people who were mistaken themselves; there are misunderstandings of occasions when the person speaking was entirely correct. There are deliberate attempts to mislead the spy.

It is not a world I have been involved in but I would not suprised if 90% accurate is actually thought to be the highest possible standard.

And if so, that is the standard the governments and others work to.