[Abby doesn't hesitate to respond. She just gives a slight shrug and goes with what they both know is the truth.]

You don't. You don't know that I'm not working with her anymore than I know for sure that you're really Dean Winchester. [a pause; she continues in the same calm, virtually emotionless, tone] But if you'll think about it, you'll see it would be a pretty stupid trick. Because I'm not asking you to go after her. I'm not even asking to use any of your weapons. I'm just looking for information on how to do it myself.