His specialty is in literature, not history, and this is why he gets dismissed, because he's not doing it the "right way". But he hunts down primary sources in Russian and translates them himself; he's corrected various mistranslations that have been used as the basis of major anti-USSR narratives for example.
A piece of evidence weighs supreme until something better comes around to dethrone it. Furr's evidence is thorough, you can't really argue that a policeman's badge wasn't found at a grave other than Katyn, because, well, it was found at that other grave. If they have evidence to the contrary they should present it instead of shriveling into a corncob. He's inconvenient and that's why he gets dismissed and people will tell you to not even try to read him.
