Oh, I didn't think I was talking about definitions. I was talking about claims of fact.
Right, it is. Because the necessity of God hasn't been demonstrated one way or the other. Any argument that rests on the necessity of God must first demonstrate that necessity.
Yes, but I’m not talking about arguments (like Anselm’s, or Descartes’) that appeal to divine necessity as a proof of God’s existence. When I mentioned the traditional belief that God’s existence is necessary I was just pointing out a similarity, to a classical theist, between claims about God and mathematical claims.
It’s important to recognise, though, that saying that God’s existence is necessary is not to say that God exists. It is simply to say that
if God exists, God does so necessarily. For comparison, I know that if 83846182+6937292=94726274 then this is a necessary truth, but I don’t know off-hand whether it actually is true or not (though it very probably is not, because I just hit the keys randomly). Similarly, I know that if the God of classical theism exists then that is a necessary truth, because it’s part of the definition of that God that God’s existence is a necessary truth, but I don’t know whether it actually is true (though I think it very probably is not). So a theist and an atheist can agree perfectly happily that God is defined as a necessarily existing being, if they’re both willing to work with that definition, though they disagree over whether that definition is actually instantiated.
Correct, which is why conversations about supposedly-spiritual or divine phenomena between someone who is a believer and someone who isn't a believer always collapse, because the believer can never demonstrate the truth of their foundational assertion (that God, for example, exists).
As I say though, I don’t think this is a “foundational assertion”. Traditionally in Christianity God’s existence is not assumed but is supposedly demonstrated on the basis of other claims. Now the supposed demonstrations may not be very good, at least to our eyes, of course, but that’s just because they’re not very good arguments, not because they assume what they purportedly prove.
Oh. Yes, definitely. "Deism", in addition to being thinly-disguised agnosticism, is intellectual judo. It sidesteps having to answer the question of whether God exists and so allows everyone to move ahead with the important work. This is one of the reasons the freedom of religion and the separation of church and state are so important. If we agree on those, we don't need to agree on whether or not God exists to coexist as a polity.
I’m not sure why you say this about deism. Historically, deism was a hyper-rational form of Christianity which sought to eradicate all elements that couldn’t be rationally demonstrated. That left only God’s existence and moral truths (supposedly), so that’s all that deists believed. Of course deism proved to be a stepping stone to atheism, because people soon decided that God’s existence can’t be rationally proved either.
Merely saying that an experience has a divine object isn't neutral, it's interpretive.
Yes, but saying that it
appears to have a divine object is neutral, isn’t it?
If it's not, then it's not evidence, it's just a claim. If it's not testable or repeatable, then you're just saying "trust me, I know what I saw."
Yes, that’s weak evidence, at least if the person saying it isn’t very trustworthy. But it’s still evidence!
E can't be evidence for H at the same time H is evidence for E. That's circular reasoning.
It certainly would be, but I didn’t say that! I said that E is evidence for H iff the probability of E given H is higher than the probability of E given not-H. That’s simply the definition of evidence.
By "flying saucer", do you mean extraterrestrial aircraft or spacecraft? Regardless, someone saying they saw a flying sauce is a claim that flying saucers exist, not evidence that they exist. Evidence has to be verifiable, or it's not evidence.
Given how many claims of flying saucers have been debunked, it's not even marginally more probable. The history of claims of flying saucers being demonstrated as accurate is zero. A cynic would say that a claim of flying saucers is by definition unlikely. That's where the "extraordinary claims require extraordinary evidence" thing comes from. I'm not exactly that cynical. I actually think life on other planets seems probable to me, based on the evidence we have, I just don't think any of them have ever been here.
I don’t agree. I think that the probability of someone thinking they saw a flying saucer is higher if there actually are flying saucers than it would be if there are not, unless one knows for certain that every single putative flying saucer sighting is mistaken. And we don’t actually know that for certain, though it is extremely probable, which is why such claims are very poor evidence.
The difference between strong (or "conclusive") evidence and weak evidence is whether or not it's been corroborated. In journalism, something that has only 1 source might be unpublishable, because it's too weak. In science, experimental results that cannot be replicated have to be disregarded until the problem is resolved. In criminal law (at least in countries where the burden of proof is on the accuser) an accusation that can't be supported by evidence has to be tossed out. In each case, weak evidence can be enough to get some distance into the process: A journalist sees enough to keep investigating; a scientific paper that breaks new ground gets published in a journal; an accusation of criminal conduct is investigated by police and gets in front of a judge. And, in each case, we rely on the skill and professionalism of the investigators, and sometimes we get hoodwinked.
Right, and that’s really exactly what I’m saying. Though bear in mind that non-corroborated evidence could be reasonably strong too. For example, if I’m in the company of an expert herpetologist and we see a snake, and the herpetologist assures me that the snake is not venomous, I could reasonably take her assertion as good evidence for its non-venomosity even though I’m not in any position to corroborate it and if the snake disappears into the undergrowth and is never seen again. But of course the evidence would be stronger if there were other herpetologists around to corroborate it, or if we captured the snake for further study.