My argument in very simple terms is this: Whatever we can conceive as existent (Santa assumed for example), we can conceive as non-existent. But there is no Santa whose non-existence implies a contradiction. There is therefore no Santa.
OK. Thank you for that simplification. It seems to me that you could even simplify it further: "Santa does not exist if Santa does not exist". My wording is not as erudite as yours, but the argument is equally compelling. You should try it on a kid who really believes in Santa sometime and let us know the response.
“You can dismiss Santa Claus and God on the very weak grounds that there is no evidence for either entity. I call that "weak", because people who believe in such beings tend to believe that they can produce satisfactory evidence of their existence, even if you do accept their evidence.” #276
We seem to be talking at cross purposes again, because I was speaking hypothetically about people believing in Santa there. As I've stated before, the main difference between God and Santa is that belief in the former is ubiquitous, and belief in the latter is almost nonexistent among adults. You and I agree about burden of proof. Where we seem to have a disagreement is that you think burden of proof is a compelling argument with respect to God, and I think that you need to move past that in order to have a reasonable debate with theists. It only convinces the already-convinced.
You only have to prove Santa’s existence if you’re arguing the proposition ‘Santa exists’ is true (burden of proof). My argument is that the proposition is false.
That misses the point. No reasonable person is going to make you defend the idea that Santa exists, so it is not such a bad strategy to bring up "burden of proof on Santa believers", dust your hands off, and walk away. Everyone will nod their heads in agreement. That doesn't work with theists precisely because they quite often find the credibility of gods to be unassailable. So you are just wasting your breath.
Santa is a magical character that brings presents to children all over the world on Christmas Eve, riding through the air on a sleigh drawn by reindeer etc, a conception that is not logically impossible. But to ask Santa not to perform those magic tricks is to ask him to not be Santa. If Santa doesn’t ride through the air and doesn’t deliver gifts to children all over the world then he cannot be what he is, which leads to an absurdity and in which case there is no Santa.
Yes. Well, you seem to have gone a little off the rails there in interpreting what I said, but we can declare violent agreement on the idea that Santa is an absurd character. Explaining why it is absurd to believe in Santa Claus is much more effective than going around with a "burden of proof" chip on your shoulder. All I meant by my remark was that a deceptive parent might use that kind of ploy to explain why the local department store Santa won't perform any magic. It is the same kind of excuse that you get for the Divine Silence of God.
Back to the argument. God is the Absolutely Necessary Being, a concept that does not require to be analysed in terms of physics, magnitude, direction or time – or any other definition or description we can think of, other than to acknowledge that pure actuality, unlike contingent matter, is a thing with no potential for being; it is what it is necessarily. It is an exquisitely clever concept, and a thing that we cannot think not to exist (which of course is not to say a necessary being necessarily exists). And while a Necessary Being’s non-existence is as impossible as a two-sided triangle, we have no such conceptual vagaries with Santa. Santa is thus possible or impossible, but unlike the Necessary Being we can conceive of Santa not existing without having to first address whether he is possible.
No, God is not the Absolutely Necessary Being. That there is such a thing as a Necessary Being is gratuitous. It begs the question of God's existence by defining God as a being that exists (and necessarily so for modal logic fanatics). This kind of neoscholastic nonsense works for Plantinga's minions, but I still harbor the hope that you don't fall for it.
I do my best to ignore flippant and unnecessary remarks but suffice to say I am very clear about the argument I’m making. There is no contradiction in denying the proposition that Santa exists is true, and the conclusion that follows is that he doesn’t exist. My argument is twofold: 1) Santa is not demonstrable. 2) Santa’s non-appearance confirms his non-existence. #1 is logically certain. #2 is inferential. Both inform us that there both cannot be and not be a Santa and hence the contradiction and conclusion.
And you think that this is a compelling argument to make to a theist? Not even I believe point #2, and I'm as strong an atheist as you are. I don't believe in God, because God can be shown to be an implausible being, not because he doesn't show up when I go looking for him.