Argument # 25: Spiritual experiences only exist in your mind, not in external reality.
Since no one knows all that exists in all of reality, including skeptics, no one can say with infallible authority what exists and what doesn't. Even if we take something out of fantasy like unicorns and dragons, for instance, we don't know that those type of creatures don't exist in the trillions of other planets in the universe since we haven't even been to any others beside our own. Furthermore, string theory in physics suggest that there may be many dimensions, which if true may suggest other planes or levels of reality that we don't understand yet. These other levels of reality could contain creatures or beings that we can't even imagine, even unicorns and dragons. Even arch skeptic James Randi has said that to say that something doesn’t exist is an extraordinary claim (though he has contradicted himself on this).
Therefore, this is another unqualified pseudoskeptical statement based on their biases and prejudices, not based on objectivity. We simply don’t know many things, and neither do they. The difference is, we admit it, whereas they won’t.