I'm looking for my glasses. There's a 50% chance I left them at my two-room house and an equal chance that they are in either room. I check one room in my house and learn that the glasses are not there. After updating on the new evidence (that I've checked one room and learned the glasses are not there), what are the updated odds? a) 2:1 glasses at home/glasses not at home. b) 1:1 glasses at home/glasses not at home. c) 1:2 glasses at home/glasses not at home. d) None of the other answers are correct