From Alan Rhoda’s defunct blog:

(1) Voluntary Nescience: The future is alethically settled but nevertheless epistemically open for God because he has voluntarily chosen not to know truths about future contingents. Dallas Willard espouses this position.
(2) Involuntary Nescience: The future is alethically settled but nevertheless epistemically open for God because truths about future contingents are in principle unknowable. William Hasker espouses this position.
(3) Non-Bivalentist Omniscience: The future is alethically open and therefore epistemically open for God because propositions about future contingents are neither true nor false. J. R. Lucas espouses this position.
(4) Bivalentist Omniscience: The future is alethically open and therefore epistemically open for God because propositions asserting of future contingents that they “will” obtain or that they “will not” obtain are both false. Instead, what is true is that they “might and might not” obtain. Greg Boyd (and yours truly) espouses this position.

For full post, click here.