User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-108.3.134.219-20121201012843/@comment-3146930-20121201141701

Ok, now that I've recovered from the whiplash of that comment and the head trauma of head-desking, I can reply to this comment:

The Prophecy of Seven only states that 7 half-bloods will answer the call, which has already happened (Percy, Annabeth, Leo, Piper, Jason, Hazel, and Frank). The prophecy however never states that all of them will live. However, Percy and Annabeth as of the end of The Mark of Athena are still alive. Simply because they aren't with the other demigods, that doesn't mean they "don't count" as you put it. The Seven aren't interchangeable.