Josh Rosenau has a post about the supernatural, spinning off recent posts about a recent Calamities of Nature webcomic. Josh makes a point that I think is valid but subtle:
The issue with the supernatural is not whether it's part of the universe, but whether it is bound by the same laws as all the other elements of the universe. The bizarre claim about ghosts is that they somehow obey some laws but not others, for no obvious reasons.
Something supernatural could, in principle, interact with the universe sometimes but not at others. If it is operating outside of natural laws, that doesn't…