I think what TB was trying to tell us...
...is that its not fair to accuse the Conservatives of trying to obscure or destroy embarrassing information as long as its still technically possible, using expert scholarship and sophisticated software, to retrieve it from wherever it might be stashed away.
Of course, it works both ways. With clever scholarship and technology it is possible to put together a compelling argument in favor of any pack of lies you want.
After all, TB is our technology and scholarship expert. 8)