We could go into failed Biblical prophecies, but you've stated you're playing devil's advocate.
There are no failed prophecies in the Bible. If any prophesy did not come to pass it is either because God changed His mind, or you have misinterpreted the prophecy (of course this assumes that the Bible is True - all bets are off if it isn't!).
And I am not 'playing devil's advocate', but merely trying to stop the goalposts from being moved. I wish we could just stick with the entity that most people think of when we say 'God', and discuss His properties
as presented in the Bible. Otherwise god becomes whatever you want Him to be, and any argument can be sidestepped by simply redefining Him.
under the scenario that you've presented, the predictions are, at best, highly likely, not certain.
I predict that there will be an eclipse of the Sun on the 13th of November 2012. That's not certain, but it is
highly likely. I think it would be fair to say that Biblical predictions having a similar level of certainty can legitimately be called 'prophecy'.
An infinite number of them, no less?
Infinity doesn't always mean
literally 'without end' - sometimes it is used rhetorically. Take your own statement above. There cannot be an infinitely large number of examples in the Bible, so you must mean something else by 'infinite' (perhaps 'so many that we cannot count them', or even just 'a really big number'?). Similarly, when a biblical passage says that God's wisdom is 'infinite', that doesn't mean that He knows an infinite number of things, including things which are impossible to know. For example, if God put true randomness into Quantum physics, then even He cannot tell whether Schrödinger's cat is alive or dead. That information simply does not exist.
God gave us Free Will, and that means that our decisions are 'by definition' unknowable to God in advance. Our decisions have a certain 'random' aspect to them, preventing God from perfectly predicting the future in minute detail. However, what He
can do is intervene to make sure that certain predictions come to pass.
As an analogy, imagine that you write a computer game. You know exactly how each algorithm works, so you can perfectly predict the outcome of any game, and you can easily beat the computerized opponent. But that's too boring, so you add a random number generator which affects the opponent's decisions. You still have enough knowledge and power to win every time (by hacking if necessary) but you must modify your gameplay according to what decisions your opponent makes. If the computer opponent was 'aware' of your existence, do you think it would be justified in considering you to be 'omniscient'?
I will accept lesser forms of Omniscience, as well, provided they can pass that test under at least some circumstances, and even potentially give a little leeway under situations that may not allow for everything to be known, merely everything that happens.
Even with that tiny bit of 'leeway' your definition is still far too strict. Nowhere in the Bible does it say that God has infinite knowledge of the future, only that He knows of certain events which will occur. This is partly due to the vast knowledge He has, and partly because He can
cause those events to happen. When the Bible says God knows something will happen, it means it! And that is
all it means.
The Bible doesn't say that God is a time-hopping multidimensional all-pervading force which has its eye on every wave and particle in the universe, but simply that we cannot presume to go against God and get away with it. He has a plan for us which will not be thwarted. He hopes that we will do the right thing. But the Bible also makes it clear that
we must make the decision to follow or reject Him. God may have the power to know or do anything
else, but He cannot make our minds up for us.
Certainly you could imagine a mathematically pure infinite 'omniscience', and then point to its incompatibility with Free Will. But that would be considering a theoretical 'god' which is not described in the Bible. If not being able to know things which are unknowable
by definition prevents a deity from being omniscient then 'so be it', but that does not in any way reduce God's powers as described in the Bible. Perhaps if people stopped applying that strawman to God, they might begin to see the True message in the Bible.
an omniscient being would know that the creature that you're speaking of doesn't exist, and therefore, the answer is that the mating habits of the Shivan wumpus do not exist. That such a thing does not exist is a valid answer to the question.
Exactly. God has
defined Free Will as being outside His sphere of influence. Therefore He can truly answer "I don't know" without compromising His omniscience, because a definite answer does not exist.
such a course of action appears in the Bible in examples like God hardening Pharaoh's heart.
This is just another example of creating meaning where none was intended. Nowhere does the Bible say
how God 'hardened Pharaoh's Heart' or even whether this was an overt action on God's part. There is no evidence that God reached into Pharaoh's mind and subverted his Free Will. In fact the Bible suggests that he did it to himself.
1 Samuel 6:6
Why do you harden your hearts as the Egyptians and Pharaoh did? When Israel’s god dealt harshly with them, did they not send the Israelites out so they could go on their way?
So what we have here is the Bible stating one thing, and people taking something else entirely out of it. God's omniscience is treated the same way by people who aim to subvert the Lord's message to suit thier own twisted agendas. The principle of a god who has mathematically perfect (and therefore paradoxical) omniscience, omnipotence and omnibenevolence is not Biblical. It is a pagan idea that is at best irrelevant, and at worst turns the Biblical message on it's head (eg. Calvinism).
No. I have no interest in dealing with No True Scotsman, regardless. I've already touched on what I consider "True Omniscience," much as I usually call it "Intrinsic Omniscience." "True Prophecy" would simply be prophecies that were certain to come true, not merely highly likely.
Fair enough. However I don't think that the impossibility of marrying 'Intrinsic Omniscience' and 'True Prophecy' to Free Will makes Yahweh into an impossible God. If the Bible is True, then He
is as described therein. The problem is our insistence on having a mathematically pure model of God.