User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-6951062-20130321230637/@comment-3146930-20130322014955

I was actually going for more of a Doctor Who feel, but I guess Naruto works to. In Doctor Who, the Doctor explains that there are fixed points in time (events that must happen) and there are time points that are in flux (events that can change). With the Fates, I believe they can see both of these points, but may not know the outcome.

For example, they knew that Luke was going to die one way or another. If Percy attacked Luke, Kronos would defend himself and burn away Luke's body. If Percy gave Luke the knife, Luke would kill himself to save Olympus. I believe the Fates saw all the events leading up to Percy's choice, but may not have known which one would come to pass. Olympus to preserve or raze indeed.