Although the capability of performing an action when one wants is a sufficient condition for natural ability, it is not the only the sufficient condition; in fact, it might be misleading to say what you said given where you put the accent. One’s liberty can be restricted due to external physical constraints (such as imprisonment) yet such constraints would not eliminate natural ability, yet your statement above seems to place the accent upon the ability to act upon one's intentions, as if the ability to act upon one's intention is a necessary condition for natural ability.
I would say the ability to act upon one's intention is a necessary condition for natural ability. If I intend to arise from my bed in the morning, but I am actually chained down, then I don't have the natural ability to arise; I am constrained from without.
Ron said:
I find the accent a bit misleading, that's all. “When one wants” does not speak to natural ability but to liberty. The man in jail, for instance, has the innate capability of walking in the park, which is to say he has the natural ability to carry out the action. However, his being lock-up precludes such action, but does not take away his natural ability; so it is false that being capable of acting when one wants is the only sufficient condition for natural ability. "When one wants" either muddies the water or implies something false.
How does a man in jail have the natural ability of walking in the park? Does that mean that, if he were in the park and desired to walk, he could? If so, what if I said that a man with no legs had the natural ability to walk in the park, provided he had legs and desired to walk? It seems the only distinction between the two is that one of them is belonging directly to the man's body while one isn't, but that seems an arbitrary divide. And if the divide is arbitrary, then your definition of natural ability as so distinct from liberty is, in my estimation, nonsense, for it would basically say that just about anything has the natural ability to do just about anything, e.g. "My dog has the natural ability to fly, because if she had hollow bones and wings (etc.), and if she wanted, then she could fly."
I would contend that natural ability and liberty are not so different. They are pieces of the same puzzle. If one is capable of doing X when one desires to do X, then one has the natural ability to do X. And if one is performing X when he desires to perform X, then he is performing X with liberty. Therefore, to have natural ability to perform an action is requisite to perform an action; and to perform an action when desiring to perform the action is liberty.
Ron said:
If God desired to sin, then he would have sinned already.
I actually would dispute this. Seeing as this is a separate topic, I'll keep it brief. First, keep in mind that there is a distinction between internal sins (lust, covetousness, etc.) and desires to sin; one can desire to do a sin, internal or external, without effecting that desire. Second, and more importantly, desires to sin are necessary in order to undergo temptation; Jesus underwent temptation; ergo etc.
Ron said:
Moreover, the If-then proposition proceeds upon a false premise, that being God having a desire to sin, which is what I believe Joshua and Matthew are driving at. It’s like saying “if a square was round, then the square x”. The antecedent that contemplates God desiring sin, or a square being round, are logically impossible since for God to desire sin would equate to God not being God, which is indeed a contradiction since by definition God cannot become not God - just like a square cannot be round.
Consider the argument:
If God could desire sin, then God could stop being God
It is false that God could stop being God
Therefore, it is false that God could desire sin
Doesn't that give us pause to argue under the premise of "If God desired to sin", then...?
Well, the mere fact that the antecedent is false does not imply that the antecedent cannot be used to convey intelligible (and therefore, possibly truthful) propositions -- as your syllogism itself proves. For how could you show such a syllogism if the first premise were wholly unintelligible? I conceded to Joshua above that it would be foolish to proceed from such an unintelligible antecedent, but, even after writing my reply to Joshua so soon, I am questioning this. If the antecedent, "If God could desire sin," is unintelligible, then why is the proposition, "If God could desire sin, then God could stop being God" intelligible? If that proposition, containing the supposedly unintelligible antecedent, is true, then why cannot other propositions containing the same antecedent be true?
I would say this goes back to the two propositions I mentioned earlier, "Pyrques kib gyjurles," and, "A square circle exists." Squares and circles are intelligible concepts, yet they are contradictory; therefore attempting to merge them leads to unintelligibility. For now, I realize that it has something to do with the fact that
parts of the proposition are intelligible, and these parts have to be distributed in the syllogism in such a way in order to retain the intelligibility of the propositions as whole, but at the moment I have worked my brain in grinding out all the details of this thread, so I'm gonna take a pass right now.
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Intelligibility is simply the ability to be understood. Only intelligible things can be possible or impossible.
These short sentences are immensely helpful.