Something related to this was discussed on the "definition of belief"
thread. I don't remember exactly who expressed what views, but I
remember quite a problem with the true existance of belief. Someone said
something to the effect that "If one believes in x, then one acts as
though x is true". This was questioned with "What if belief in x
necesitates no observable action?" This can be rephrased for our current
discussion; what if the existance of x leaves no observable evidence of
it's existance?
-- John Aten jwa@inx.net