Socinian "Foreknowledge" More Logical than Arminian "Foreknowledge"

“In respect to this point (viz., Divine Foreknowledge, aku), the Socinian is more logical than the Arminian. Both agree that God does not decree those events which result from the action of the human will. Voluntary acts are not predetermined, but depend solely upon human will. Whether they shall occur rests ultimately upon man's decision, not upon God's. Hence human volitions are uncertainties for God, in the same way that an event which does not depend u[on a man's decision is an uncertainty for him. The inference which the Socinian drew from this was, that foreknowledge of such events as human volitions is impossible to God. God cannot foreknow a thing that may or may not be a thing; an event that may or may not be an event. The Arminian, shrinking from this limitation of the divine omniscience, asserts that God can foreknow an uncertainty; that is, that he can have foreknowledge, without fore-ordination. But in this case, there is in reality nothing to be foreknown; there is no object of foreknowledge. If the question be asked, What does God foreknow? and the answer be, that he foreknows that a particular volition will be a holy one; the reply is, that so far as the Divine decree is concerned, the volition may prove to be a sinful one. In this case, God's foreknowledge is a conjecture only, not knowledge. It is like a man's guess. If, on the contrary, the answer be, that God foreknows that the volition will be a sinful one, the reply is, that it may prove to be a holy one. In this case, also, God's foreknowledge is only a conjecture. To know, or to foreknow, an uncertainty, is a solecism. For in order to either knowledge or foreknowledge, there must be only one actual thing to be known or foreknown but in the supposed case of contingency and uncertainty, there are two possible things, either of which may turn out to be an object of knowledge, but neither of which is the one certain and definite object required. There is, therefore, nothing knowable in the case. To know, or foreknow an uncertainty, is to know or foreknow a non-entity. If it be objected, that since God, as eternal, decrees all things simultaneously, and consequently there is really no fore-ordination for him, it is still true that in the logical order an event must be a certainty before it can be known as such.”  

W.G.T. Shedd, Dogmatic Theology, Volume 1, Chapter VI, pg 397-398