And I stand by my point that a supernatural being cannot be proved by science, because by its nature it is supernatural, and therefore does not follow scientific laws. This renders the being's existence impossible to prove scientifically. I'm still baffled that some people don't understand this simple concept...
Mediumship is a phenomenon that can be tested. A supernatural or discarnate entity can be shown to be the simplest explanation of certain evidence, like in the paper "The Problem of Seth's Origin" or the case of the dead chessmaster who communicated details of his life and played a game characteristic of the prior personality. The hypothesis that is used to explain the existence of this type of personality is called 'survival'.
http://www.aeces.info/Top40/top40-main.shtmlThe problem with this type of research is that it's not repeatable, and in terms of scientific evidence it's very flimsy. Similar to the articles you posted about Deepak Chopra and Stuart Hameroff, they have various theories (some of which do make sense) but it's mostly just speculation. And I don't tend to trust speculation very much when it comes from Deepak Chopra, who as I said is clueless about things like quantum entanglement...
Don't know much about Hameroff, I'll look him up.
Edit: Ah, Hameroff co-wrote the papers regarding the Orch-OR model of consciousness, with Roger Penrose. I've read a little into this hypothesis, and it is very interesting to say the least. But it is not conclusive evidence for any sort of consciousness controlled by quantum computation, their ideas have a lot of criticism.
Their theory is the best one on the market, it helps explain the clever behavior of paramecium.
The criticism of Penrose/Hameroff's theory is outdated, more recent papers provide new evidence.
Chopra is not clueless about science since according to Hameroff his view is the right one!
There are replication studies in Parapsychology. Also:
Mediumship can be produced and observed under conditions of experimental control, see Cunningham's paper "The content source problem in modern mediumship research".