[Slick]

On that subject, I would have to quote the familiar:

"Absence of evidence is not evidence of absence"

And would point out that it would be very presumptious to assume that all things are required to be made up of mass or energy. Just because we don't know how to observe something is not sufficient to prove it does not exist or to conveniently dismiss them.

A soul may or may not exist. We don't even agree on what it is, much less what it is made of or how to detect it. Therefore, there is not enough evidence to disprove it. As for proof, not enough evidence there either.

Arthur C. Clark (inventor of the communications satellite, author of 2001: a space oddesy, investigator of the mysterious) once had a rating system for mysterious things. It went from a +5 (being unquestionably true and provable to anyone) to a -4 (being almost certainly not true). His system had no corresponding -5 rating for the very reason that you can't prove that something doesn't exist just because you can't find it.

Now he did not apply this to mathematical "mysteries" where it is possible to prove that some things don't exist. He used this system for common mysteries like Bigfoot, Voodoo, etc.

Slick.