HP MoR: ch45: The hint is about why the Dementors are out to get Quirrel

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

• gwern estimated 20% on 2012-04-04
• Oscar_Cunningham estimated 20% on 2012-04-20
• gwern changed the deadline from “on 2015-01-01” on 2015-01-01