I am putting together a large post on the problem of evil, where I intend to clearly and fully lay out my reasons for thinking that it is unsound. Before that, I want to outline some of the important ideas I will be drawing on. Since the main post is probably going to take a while.
I intend to put forward a positive skeptical theism, rather than a negative skeptical theism. Maybe a higher burden for me, but it is also compatible with some what I am thinking of as second order theodicies: reasons why God might want us to be skeptical theists.
Consider this principle: “An observation E is evidence of hypothesis H over the negation of H if H predicts E at a higher probability than the negation of H predicts E”
This is a straightforwardly Bayesian definition of evidence, but under this definition, it seems like the problem of evil fails. Since clearly, Christianity predicts the existence of horrors at some high probability, the existence of horrors can’t be evidence against Christianity.
The atheist here has a way to continue: Christianity doesn’t predict horrors a priori from some core principle, but instead slaps that prediction on to the world view in an ad hoc manner so that it won’t be defeated by evidence. Just like adding epicycles to geocentrism. Add enough epicycles and you can overcome and contrary evidence.
When it comes to predicting horrors a priori, I think we need to flesh that out more: neither you nor I can be said to really be making predictions here a priori at all. Both of us are embedded in long intellectual traditions which have evolved and developed in many ways because of the horrors that exist. Job might be the earliest Christian writing that exists, and you’re not willing to call it a priori. Maybe we treat this similarly to scientific advancement. I have an older theory which you claim has some ad hoc modifications to make my predictions true, while you have a newer theory which has no ad hoc modifications. I claim I have no ad hoc modifications, and that these predictions are really motivated by the belief. What we need to work out is whether my “ad hoc modifications” are epicycles or if they’re dark matter. I think that this doesn’t come down to “a priori” because that’s a mythical place neither of us can get to. I think it comes down to whether Christianity’s prediction of horrors (which you’ll definitely find in the scriptures) is consistent with the Christian worldview, or whether it’s an inconsistent or unmotivated concession to reality, to avoid rejecting Christianity entirely. And I think it’s easy enough to argue for that consistency.
Even if we take a very minimal Christianity to be the central motivating principle for our predictions, we have the Gospel. The Gospel is the center of all Christian theology. And the Gospel is that Christ came into a dark and evil world and rescued helpless, unworthy, and wretched sinners. So right there we have a motivated prediction of the existence of evil. We even possibly have a prediction for the greatest evil, the crucifixion of Christ. And not only the crucifixion, but the evil it takes to make the world dark enough, so that Christ is more glorious in incarnating. And the evil it takes to demonstrate us to be unworthy, or to make us unworthy. If we’ve predicted great evil, have we also predicted horrors? I think so. The only way we don’t predict horrors is if we also predict that we will have access to all of God’s reasons for each individual evil. But how would we have that access? Either God grants it to us via revelation, or we are able to plainly see it. But why should we expect either of those, given our wretched state and the transcendence of God? It’s very plausible that I can’t understand what an individual horror is doing any more than my cats can understand why I abandon them for hours every day. And it’s also plausible that God deliberately keeps such things hidden from us to remind us of our lowly state compared to Him, and to help build in us such qualities as trust and compassion. I don’t think it’s possible to truly develop compassion without being subjected to mysterious suffering, and I don’t think there’s any real trust if I always know precisely what God is doing.
If my wife says “trust me”, and I tell her “of course I trust you, I’ve got a hidden camera and microphone on your handbag”, maybe I don’t actually trust her. But if God wants us to trust Him (which He does under Christianity), then there must be some times of darkness where we cannot see what God is doing.
And there is one final strong argument here: some of the people who have experienced the worst horrors have remained theists, and indeed Christians, and have often said afterwards that they can see now what God was doing in them through the suffering and evil. The kinds of evil and suffering that they have experienced are not vastly qualitatively different to the kinds of evil you’re calling horrors and using to motivate your argument. But the people experiencing that evil are in a better place than you are to talk about whether it’s unjustified, and many of them say that it’s justified. Plausibly then, all such evil is justified. Does this argument work in reverse? Are those who don’t say it’s justified a problem for me? I don’t think so, I don’t think the observation is symmetrical. I think “I do see reasons, therefore reasons exist” is a lot stronger than “I don’t see reasons, therefore they don’t exist”. Seeing reasons is a very good reason for thinking that there are reasons, just like me seeing a chess tactic is a pretty good reason for thinking it exists: I’m wrong sometimes, but rarely. But when I don’t see a tactic, that is not a good reason to think that there is no tactic: I often miss tactics, much more often than I incorrectly see tactics. And I think also that the “I see reasons” often comes late in life, after a lot of reflection, and that puts it in a better epistemic position than “I do not see reasons”, which is often immediate and often supplanted by seeing reasons decades later. So by the fact that for any class of evil, some thoughtful, reflective people who have experienced that evil will eventually see reasons for it, I think we can plausibly say that there possibly exist reasons for any evil in that class. This undermines the atheist’s judgement that there are no reasons for some particular horror.