- Every natural perceptual faculty we have sometimes functions veridically.
- We have a natural faculty of religious perception.
- Religious perception is always perception as of something supernatural.
- If a perception is as of an F, and the perception is veridical, then there is an F.
- Therefore, there is something supernatural.
One can always also try a probabilistic version of the argument: it is very unlikely that a faculty should never function veridically, so probably there is something supernatural.