HP MoR: ch45: The hint is about why Harry can't hear Dementors

Created by gwern on 2012-04-04; known on 2016-01-01

• gwern estimated 40% on 2012-04-04
• gwern on 2012-04-04
• LauralH estimated 5% on 2012-04-11
• Oscar_Cunningham estimated 22% on 2012-04-20