Molina's View of Middle Knowledge

Sometimes Calvinists are accused of "straw manning" Molinist positions regarding God's knowledge of conditional future contingents.  I recognize that there are many different Molinists, and that they may have many different views.  The following, however, are Molina's views, as summarized in the introduction to Part IV of Concordia, "On Divine Foreknowledge," by Prof. Alfred J. Freddoso, a go-to expert on this topic (and not someone likely to be accused of being a Calvinist) (pp. 23-24):

 On Molina's view, then, the source of God's foreknowledge of absolute future contingents is threefold: (i) His prevolitional natural knowledge of metaphysically necessary states of affairs, (ii) His prevolitional middle knowledge of conditional future contingents, and (iii) His free knowledge of the total causal contribution He himself wills to make to the created world. By (i) He knows which spatio-temporal arrangements of secondary causes are possible and which contingent effects might emanate from any such arrangement. By (ii) He knows which contingent effects would in fact emanate from any possible spatio-temporal arrangement of secondary causes. By (iii) He knows which secondary causes He wills to create and conserve and how He wills to cooperate with them via His intrinsically neutral general concurrence. So given His natural knowledge, His middle knowledge, and His free knowledge of His own causal contribution to the created world, He has free knowledge of all absolute future contingents. That is, He has within Himself the means required for knowing with certainty which contingent effects will in fact emanate from the actual arrangement of secondary causes.

In a paper on Molina (available here), Freddoso similarly summarizes Molina's views on God's knowledge this way:

According to Molina, then, the basis for God's providence and for his foreknowledge of absolute future contingents is threefold: (i) his pre-volitional natural knowledge of metaphysically necessary truths, (ii) his pre-volitional middle knowledge of futuribilia, and (iii) his post-volitional knowledge of the total causal contribution he himself wills to make to the created world. By (i) he knows which spatio-temporal arrangements of secondary causes are possible and which contingent effects might possibly emanate from any such arrangement. By (ii) he knows which contingent effects would in fact emanate from any such arrangement. By (iii) he knows which secondary causes he wills to create and precisely how he wills to cooperate with them via his intrinsically neutral cooperating grace and general concurrence. So given God's pre-volitional natural knowledge and middle knowledge, he is able to choose a comprehensive providential plan; and given further his post-volitional knowledge of what his own causal contribution to the created world will be, he has free knowledge of all absolute future contingents.

The "Internet Encyclopedia of Philosophy" provides these insights (link) that claim to relate more broadly to Molinism and not specifically to Molina:

In the contemporary discussion of possible worlds, two concepts have proven particularly instructive: actualization and similarity. In popular piety, it is not unusual to refer to God creating the world. However, in possible worlds semantics, this is seen as semantically improper. Instead, God’s creative activity should be referred to as creating the heavens and the Earth, but actualizing a particular possible world (since possible states of affairs do not have a beginning, which the language of creation implies). According to the doctrine of Molinism, God can actualize a world where His will is brought about by the free decisions of creatures, but in order to make this claim, contemporary Molinists have had to distinguish between strong and weak actualization. Strong actualization refers to the efforts of a being when it causally determines the occurrence of an event (e.g., God causes something to happen), while weak actualization refers to the contribution of a being to the occurrence of an event by placement of a free creature in circumstances in which he will freely cause the event. Weak actualization has proven to be a powerful tool for understanding the relationship between God’s providence and human freedom. However, it must be noted that it implies that there may be some states of affairs that God cannot weakly actualize, which leads to the further conclusion that there may be some possible worlds that God cannot actualize.