beta_b by or on Halloween

Created by KnaveOfAllTrades on 2014-10-14; known on 2014-11-01; judged wrong by qwerty314 on 2014-11-04.

• KnaveOfAllTrades estimated 64% on 2014-10-14
• qwerty314 estimated 60% on 2014-10-22
• qwerty314   judged this prediction wrong on 2014-11-04.