If we define omniscience as having all knowledge of all that exists, then if the future does NOT yet exist then knowledge of the future isn't necessary for omniscience.
This is perfectly true. But I don’t see why people can suddenly redefine what omniscience means in this way. All-knowing is pretty unambiguous I though.
First, omniscience means that someone knows everything it is logically possible to know.
How is foreknowledge illogical anyhow? I haven’t seen established and really don’t see how it is illogical or contradictory.
Consider a parallel with omnipotence. Is God not omnipotent if he cannot create a rock so large that he cannot lift it?
This is like the immoveable wall and unstoppable object. In this case these concepts are definitionally contradictory. Their very definitions logically contradict each other – I do not see the parallel between this and foreknowledge.
Omniscience means that God can know whatever it is logically possible to know.
I do not see the logical contradiction in the concept of foreknowledge. How is the idea logically inconsistent?
You should therefore provide some argument for believing that future-oriented propositions have a truth value (or at least can have one).
I think this follows from the concept of omniscience. If future orientated propositions cannot have a truth value then omniscience, as a concept, fails. What you have done is to essentially redefine omniscience to be the set absolute knowledge less foreknowledge.
There is also a claim being made that omniscience only covers knowledge that ‘exists’. I consider knowledge to be similar to concepts in that they only ‘exist’ when they are known. A concept doesn’t exist until someone or something conceives that concept. If this line of reasoning is true then the existence or non-existence of knowledge is tautology.
Perhaps that's because you're being too simplistic?
All-knowing seems a pretty simple concept to me. At the moment you are making the claim that future knowledge is illogical in some way. Care to elaborate on that in case I am missing something?
It is a simple thing, you agreed with me that God does not choose amongst various scenarios for creation... that leaves open the possibility of free will...
Firstly, I didn’t agree with this. I merely rejected your ascribing of a claim to me that I never made. I am not making any declaration of god’s intentions or lack thereof. I don’t think it matters either way.
Secondly, god still created. Whether or not that was a ‘choice’ in some way or not doesn’t change that it was an act of creation to set the ball rolling.
I am arguing an alternative that allows P1 Omniscience, and P2 Creator, to not equal C No free will.
So far you have done this only be redefining omniscience to be something other than all-knowing.
Which premise did I reject? I have stated multiple times that God is omniscient, and that God is the creator...
My apologies on this. I confused you with Dunemeister. You only did it once.
If the future does not exist, it is in the same category as unicorns.
I have already pointed out the important difference here.
If you expect an omniscient being to know one non-existant bit of information, to remain consistent, you must expect that being to also know all other non-existant information...
As pointed out previously, foreknowledge is very different from unicorns because one can have an actual truth value (to use your phrase) and the other (assuming unicorns do not, never have and never will exist) doesn’t. A proposition about the future will be shown to be false or true – the same cannot be said for your unicorn analogy. Constructing an analogy that cannot have a truth value (assuming unicorns are always fictional) cannot be compared to something you have failed to demonstrate also has a truth value.
In order to reach your conclusion, you have to limit all knowing to the results of the choices that were made and have to ignore all the other possible results.
Two things:
Firstly, you are assuming that those ‘other possible results’ are possibilities. I do think that, assuming the premises of omniscience and creator, there is only one possible course of results. And that is the course that the omniscient creator knows.
Secondly, I don’t see the contradiction in your idea. Assuming those possible choices were possible - why wouldn’t an omniscient being know all those choices AND the choices that will be chosen? The set of possible choices plus the set of choices that will be made would seem to be compatible with knowing everything. I don’t see the reason you think the OP placed limits on omniscience.