User blog comment:Courier21/My Theroy/@comment-2152155-20100813211847

well, when a subject is put in the animus it shows the life and memories of an ancester, and since "the doc" and lucy knew desmond was an assassin they knew his ancesters were an assassin, but they didnt know which ancester is was gunna be until desmond got in the animus, nor did they care cause all vidic wanted was a map that revealed the locations of the pieces of eden, and as for the hidden blade, ubisoft never mentioned who it was yet but it looks like the one ezio and giavona were