The professor will offer some sort of reward to the students who show up at today's optional class

Created by Peter Hurford on 2013-03-01; known on 2013-03-02; judged wrong by Peter Hurford on 2013-03-01.

• Peter Hurford estimated 30% on 2013-03-01
• Peter Hurford   judged this prediction wrong on 2013-03-01.