What, again, is the probable lie question in the polygraph?
Thanks
Your question is addressed on the AntiPolygraph.org Frequently Asked Questions list:
http://antipolygraph.org/faq.shtml#q9
You'll find a more detailed discussion of probable-lie "control" questions in Chapter 3 of The Lie Behind the Lie Detector (http://antipolygraph.org/pubs.shtml).