Question 12) What happens when a secret keeper dies? Seems to be a contradiction whether the secret dies with him (Book 3) or whether all those to whom the secretkeeper divulged the secret to become keepers in their own rights?
Question 13) Can prefects dock points? Incosistency. In Book 5, Malfoy is informed that prefects cannot dock points, however in book 2 Percy docks points from Ron for being in Myrtls lavatory. (Although “cannot dock points from other prefects“, it is clear from that chapter that it was a chiddush that Malfoy could dock points at all. V’dok.