Flawless.
A Facebook friend linked to these recently. Most of them are satirical strawman proofs; no need to take them seriously, but some do point out actual weak arguments. There’s too many good ones to point out, but check out one of the Carl Sagan Dragon arguments, number 90:
CARL SAGAN’S DRAGON IN MY GARAGE ARGUMENT (I)
(1) God is like an invisible, incoporeal, floating dragon who spits heatless fire in my garage.
(2) You can’t disprove that such a creature exists.
(3) However, claims that cannot be tested and are immune to disproof are “veridically worthless.”
(4) That’s just a convoluted way of me trying to tell you not believe in God for absolutely no reason because we can’t come up with any reasons to justify our position in any way.
(5) Therefore, God does not exist.
One is reminded of Russell’s teapot and the Flying Spaghetti Monster with this argument—both of which are also somewhere on that list.
The fatality is hidden in first premise. Dragons and fire are things sensually perceived. That is, someone must have had perception of the dragon and fire yet is ascribing physical properties to an incorporeal thing. This is something that the Bible does with God only by way of analogy or by actual physical manifestations (pillars of fire and smoke, Jesus, the burning bush, etc). There’s no possible way to receive sensual data unless the thing is corporeal; there’s a reason why someone claimed a fire-breathing dragon is in the garage*. What is it?
One good reason is if the dragon were perceived, say, at one point in time, but before the dragon disappeared it claimed to actually always be there yet not perceptible**. Well, then you have sensual evidence via memory of the dragon—though the evidence is not “transferrable.” The other person would have to take his word for it.
* Unless the person is crazy, lying, mistaken, or being kind of dick about things. But those are different arguments to make. This proof is one questioning empirical evidence, not the mental state of the person making the claim.
** The point could be raised that the dragon is lying or mistaken about actually being there without being perceived. Again, that is another argument to make and depends on whether the person is already open to the supernatural or not. Although the fantastic notion of a dragon appearing in your garage and communicating meaningfully to one person is good grounds for questioning a non-spiritual worldview in itself.