andur
[10] Knight
The CPU would probably help you in terms of punishment, but that's about it.
Sometimes you'll see it pull out a move or combo or something that you haven't seen before. I've also found out a few times against it that things that I thought were combos are actually possible to get out of. Course, you can find that out in training mode as well. (though it has its flaws and ommissions, why's there no break all throws option or the ability to just pick any move from a list for the training dummy to do?)