It is certainly relevant to the vast majority of us who do not hold to a naïve notion of the principle of alternate possibilities. From now on, I will just call it naïve PAP. I don’t really care who says they reject naïve PAP. The point is: most of us libertarian theists (and almost all Catholics – you are on a Catholic forum after all) require a causal explanation. All determinists I know require a causal explanation.
Would you also say that any questioning of Catholic beliefs is also inadmissible – for the same reason, namely being on a Catholic board? If that were the case, then my whole presence here should not be allowed.

Would you say that your definition is the only one which is correct, or are you open to the possibility that it might be incorrect, and consider alternatives?
Then you read the wrong article. Here is the one that applies to this discussion, at least now that you’ve made the definition of free will an issue:
plato.stanford.edu/entries/free-will-foreknowledge/
After all, your entire argument rests on the fact the God foresees all events.
Very interesting article. The example, which should be reason to discard PAP merits attention. In it Mary Jones has the full control to commit the act, but she has no control over avoiding it. So, even by your definition (the locus of control resides with the agent) she does not have full control, she only has partial control. So she has no true “control” over her actions – she has no “true” free will.
Free will is never “absolute”; it can only be analyzed in a specific scenario, in regards to a specific aim. Let’s consider another hypothetical scenario: “Someone is trapped in a burning high-rise. In the room there is a lot of food. He has full control over eating anything that is available. In that regard he has full control. Being trapped, he has two choices in regards to his close future. He can stay put and burn to death, or he can jump and gets crushed to death.” He has no option to survive the incident. What does your definition say about this scenario? He has two options; he has full control which one to choose. By your definition, he has unabridged free will.
By my definition he has no freedom to survive. The options available are insufficient. It is possible that Mary Jones (in the example) may change her mind, and she does not want to kill White any more. Does she have the freedom to avoid it? She does not. If she does not change her mind, she has full control; she may even choose what method to use to kill White. But that is not sufficient to have “true” free will.
As a matter of fact, this reminds me of an old sign on the boss’s desk, which says:
Rule #1: The boss is always right.
Rule #2: In the event to the contrary, refer to Rule #1!
So for free will to have any meaning, it is essential that one has the significant control to achieve what one wants, or it’s opposite. That is the only problem with the “locus of control” definition, it does not specify: “control over what?”.
In a moral dilemma-type of scenario, the only true dilemma is to act morally (which can be done in many ways), or to act immorally (which can also be done in many ways). According to the “naïve” locus of control (yes, imitation is the highest form of flattery… and I mean it!) it is supposed to be enough to have many options to carry out one “horn” of the dilemma, and it is supposed to be irrelevant to be unable to act according to the other “horn”. In such a case it would not be a moral dilemma any longer, would it? And that is exactly what we are contemplating in this discussion: the moral choice (to act morally or immorally).
Of course, deep down, I totally agree with the locus of control. As far as I am concerned, those humans who are able to act morally in many (or at least 2) ways have “enough” free will – and they are not “robots” in any sense of the word. By the same token, those humans, who are only able to act immorally (also in many ways, but at least 2 ways) are also not “robots”. (To have at least two options is essential; otherwise we cannot even speak of “choice”.) However, that was the unanimous objection in my other threads, where it was stipulated that only being able to act either morally or immorally is the “freedom” to avoid “robotness” (if there is such a word). I find it highly amusing that we exchanged roles (if you will) and now you argue my position, and I argue yours (not personally yours, but the Catholic stance - as expressed by the posters around here, which might be incorrect). Generally speaking, you are correct. However, in this case we talk about a “moral dilemma”. Without having the option to act either morally or immorally one cannot speak of significant free will in this regard.
So you will use the naïve definition of free will that nobody else on this forum uses? Argue against a strawman if you wish. Of course it is worse than that. If we accept your definition, then this entire exercise was a waste of time. All you needed to do from the outset is show that there is no such thing as free will because God foresees all, such that nobody could “choose otherwise.” You didn’t do that. Why not? I think you understood quite well that most here do not believe in naïve PAP.
If disagreement would automatically mean “strawman” argument, then what am I doing here?
I have heard logicians refer to necessary cause and sufficient cause, but never mathematicians. I do know what you mean, so let’s see where it leads.
I am talking about necessary and sufficient prerequisites.
… continued in the next post.