Are there any other ways of arguing against the apparent abilities of Mediums other than by pointing towards the alternative naturalistic explanations for their 'results'. I'm getting very tired of having to provide answers to the 'well how else do you explain X?' response (and pointing out that even if I can't explain X, it doesn't make X true by default). Perhaps there's a way of showing how the idea of disembodied souls is flawed in the first place, or debunking a similar aspect of the background theory. I'm getting very concerned that my Mother-in-law's fascination with the Mediums on TV and and in the books she reads may lead to her wasting lots of money she can't really afford.