PaulK writes:
Now I don't know about Odin, but the Christian God ought to be able to work out the consequences of His interventions in advance. In that case whenever He intervenes and changes the future, doesn't He bear some of the responsibility for the changes?
I see what you're saying here.
And I must agree.
That is... let's make Odin similar to the Christian God now and give him the ability to also "view possible futures due to intervention by Odin."
Now, Odin can see the non-interference future.
Odin can also see all the possible Odin-interference futures that could be created by interfering in whatever sense he decides on.
In a sense, you could say that such an Odin interfering in any way removes everyone's free will since now Odin has "chosen" the precise future that gives the outcomes he is looking for.
Carl's decisions are still up to Carl as far as Carl is concerned, but this "overview shift" implemented by this newly-empowered Odin would remove free will, even In Principle... according to me, anyway.
Given this, it means that the only way for immutable prophecy and free will (In Principle) to co-exist would be for Odin to never have this new-ability to forsee the possible Odin-interference futures.
Therefore, Odin wouldn't be able to know if his prophecy is going to result in Carl choosing the exact same thing again.
Therefore... it is still possible for Immutable Prophecy to co-exist with Free Will (In Principle).
-Odin must not be able to forsee the future due to his own interference
-Carl's personal decision must be to stay in line with the prophecy, even once given the new information of the prophecy
So this means that it would have to happen "by chance" and there would be no way to know if it actually happened or not.
So... the situation may theoretically exist, but pretty much uselessly so.
I agree that if Odin gains the abilities such as the Christian God, then there is no way for Immutable Prophecy, regular prophecy, or even any other sort of interference (non-prophetic perhaps) to exist along with free will. With such abilities, the god must absoutely refrain from any and all interference in order to allow free will to exist.