So can memory and reality.

So can research, or the interpretation of any documented fact or historical narrative. The same facts can be deliberately manipulated to reach a false confusion, or innocently and sincerely interpreted or selected to mean different, even contradictory things. The latter is the most dangerous, because even the perpetrator is unaware he is fooling himself. You see a lot of that on the Zone.

Its the only way you can explain how several intelligent, honest commentators can arrive at totally contradictory conclusions. Unless, of course, one is in the employ of a Great Conspiracy.