==Diffuse Obtuse Prose== 

 Can someone present an introductory definition that is cogent?  Right now this article fogs:  "In short, [ROFL!] open theism is the view that since the fact of free choice means the future is partly a realm of possibilities, and God's sovereignty means the future is partly a realm of determined facts, God's omniscience entails knowing the possibilities as possibilities (as well as their respective probabilities) and determined facts as determined facts."  Could this be what you are trying to say: 

 :"God does not know or determine everything in the future, but only part of it."