Board Thread:Wiki Discussion/@comment-4377876-20130131024419/@comment-1845428-20130208232012

Because Sly was not there. She did not notice that Bentley had been "brainwashed" by Sly until long after he got amnesia. And the Black Knight was a way to make herself more powerful, it was not necessarily a disguise. She never called herself the Black Knight, in fact, she calls herself Penelope while wearing the suit. And she did build a time machine, for Le Paradox.

I think that people put too much thought into the stuff from the game. It isn't meant to be a giant enigma. It's meant to be a game, and basically once you finish the game, you have no more "mind puzzles" to solve.