@Ren -- I hesitate to introduce this nitpick, because it's not necessarily the main issue you're discussing, but I think a world that is all-good wouldn't involve my fearing people betraying me, because not only would all people be good-intentioned in such a world, but I'd
know they're good -intentioned --- clearly a world where I'm tricked into fearing everyone being Hitler when they're angels ain't great. Even if my dagger turns to feathers, or whatever, due to funny laws of nature preventing my harmful act, the very fact I was in terror and distress does not represent an all-good world. I should not have reason to fear in an all-good world, and I should be rational and KNOW there is no reason to fear -- i.e. not have an irrational pathology.
I agree with you now, but not actually on the basis of what you say here. (I'll come to why I agree later in the post.*) Thus far my idea was that in such an 'all-good' world, I wouldn't know people are good-intentioned so much as I would know they are
predictably intentioned. I wouldn't call their intentions 'good' because those are the only intentions I'd be familiar with. Would I be able to conceptualise the idea of my fellow humans stabbing me from behind in such a world? Yes, I'm inclined to think so. But until very recently I was much more reticent to accept that I would conceive of this action (the stabbing) as
evil.
What I was getting at in my previous post is that the concepts of good and evil are quite peculiar concepts, in that they are heavily valued. The value comes 'on top' of the brute fact of the action and is assigned by human beings themselves. Thus for example, in our world, I would see my wife's cheating on me not just as something that emotionally upsets me, not just as disregarding the legal binding of marriage, but as
evil because I know my wife made that choice freely. If my wife didn't make that choice freely then I would still see the act as emotionally upsetting and as disrespecting the legal binding of marriage, but I couldn't see it as evil.
If this is true, then in order for me—in my possible world—to conceive of evil, I would have to imagine beings of a different nature than mine, beings whose free will is 'more expansive' than mine and who can intentionally choose to e.g. hurt others where the decision not to hurt them was equally available. Is this possible? Actually yes, it is possible to conceive of evil in these conditions. But note that this is also where the concept of good is made possible by opposition. I would conceive of the good
in relation to those beings, not in relation to me. And so I wouldn't think of myself as a good man; nor as a bad man. It just so happens that my actions align with those of the 'good' creatures with free will, who are legitimately good because they freely choose to perform good actions.
This leads me to argue that the concept of 'necessary goodness' is not a concept available to me in that possible world without evil. Further, this is not a sign that that possible world is deficient in any way. On the contrary, I think it casts light on the broader fact that 'necessary goodness' is inconsistent in general for finite beings. Those that legitimately qualify as good can and do commit evil acts, whereas those who can't commit evil acts don't qualify as good. Only an infinite and perfect being who is capable of envisioning evil without selecting it nor being tempted by it could be necessarily good, but even so he would be necessarily good
according to us who worry about such things as good and evil because we are finite. Good and evil, in other words, are inherently tied to finitude. This is at least what I contend, on the basis of good and evil being axiological concepts.
Outside of the human viewpoint, then, I don't think necessary goodness is consistent. I think this is why the ontological arguments for the existence of God consistently define God as a 'supreme' or 'perfect' being, not an 'all-good' being. They do that because
perfection allows itself to be defined in non-valued terms. Similarly the cosmological arguments for the existence of God, of the 'God is the uncaused cause' kind, are agnostic with regard to value. Of course these arguments would prove unsatisfactory from the perspective of Church teachings, but the issue here lies with the Church teachings being inconsistent.
Long story short, I don't think God is an incoherent concept, but if that concept were defined as 'necessarily good being' then that would make me an Ignostic!
*Now, here's a possible counter to what I talked about earlier. Perhaps the concept of good
is available on its own, without the need for it to be opposed to evil. Suppose I walk through an alley and come across a homeless person. If I give them nothing I am neither evil nor good; if I give them something, say 5 dollars, I am good; but if I give them more than 5 dollars, I am
better. And this can obviously go on indefinitely. In other words, if we dismiss the purely dichotomous evil/good scheme in favor or gradations of good, then free will is preserved for those gradations, and it becomes possible for a 'necessarily not evil' being to conceive of itself as 'necessarily good'. On that view, what remains subject to contingency is just
how good they are.
By extension this works also for God. If God's free will ranges across different levels of goodness then he can conceive himself as necessarily good
on his own terms and not just from a human viewpoint. Perhaps the fundamental problem would remain, however: is a being who is 'merely' necessarily good, but not necessarily
the best, sufficient to qualify as God? I'm not sure this is satisfactory, but to me this is the only way to preserve the valuation of goodness within the definition of God. That said, it might be more expedient to remove
goodness from the definition altogether.