Or “On the Compossibility of the Non-Existence of Actual Alternate Possibilities and the Existence of Real Alternate Possibilities”
On my view there are three modes of possibility: logical, metaphysical, and actual. Logical possibilities are those permitted by logic, metaphysical possibilities are those permitted by logic and the laws of metaphysics, and actual possibilities are those permitted by logic, the laws of metaphysics, and actuality.
Actual alternate possibilities do not exist, and therefore knowledge of the future is possible.
When mere metaphysical possibility is too broad to be relevant, and actual possibility is too narrow, we turn to “real” possibilities to describe possible worlds in which the basic properties of the actual world obtain and in which history has gone identically to the actual world up to a given point.
The compossibility of the non-existence of alternate actual possibilities and the existence of alternate real possibilities means that foreknowledge and free will are also compossible.