Well... in that scenario, you're pretty much screwed, I'd have to say. ...

So you might as well not think about the possibility that you're a brain with choreographed thoughts, because there's nothing you can do about it...

Unless, of course, that's what they want you to think.

Yep. That's pretty much the conclusion I drew in a previous post in the sequence. http://lesswrong.com/lw/s0/where_recursive_justification_hits_bottom/4wsn

Assume you can win. Assume that everything necessary for you to win is true. If it isn't, you're screwed anyway.