if the repositioning of that slipped disc and vertabrae in my back was an illusion, then having it slip out of place must have been an illusion too, and so was all that pain I suffered for so long. (Daylia)

All experimenting and the cleverly thought out (placebo) control groups are usually not for (dis)proving what happens (you don't need a long study for get agreement about that) but for testing (and possibly disproving) different interpretations.

If someone says 'It did work for me, so I know spiritual energy...' a critique from a scientist usually does not attack the first part but the so I know... part.

Wolfgang