[Open theism](https://en.wikipedia.org/wiki/Open_theism), in a nutshell, asserts that the future free choices of agents endowed with free will are unknowable, and therefore that God, though omniscient, is not capable of knowing in advance what we will freely choose in any particular future situation because future free choices are unknowable things, as I just said.

What is the biblical basis for Open Theism?