This demonstrates the robot Leonardo's ability to reason and act competently in situations when the other (in this case, human) agents have different belief states.
Attribution: The Open Education Consortium
http://www.ocwconsortium.org/courses/view/6db4340c5cba0a5012d68f28218b331e/
Course Home http://videolectures.net/aaai07_gray_lga/
