Orac, I empathise with your frustration in dealing with someone who must seem unable to grasp a relatively straightforward concept. I accept that the rainbow is almost as illusory as the crock of gold at its base. I accept that for all practical purposes infinity is an illusion. I also accept that those who find infinity encroaching on their work have to devise a way to make it practical. I realise that without the “shut up and calculate brigade” in QM our technological progress would stagnate, and that the same sort of concept has to be applied to infinity.
However, having said all that, I suspect that QM could tell us more about reality than we need to know to build computers and the like. I also suspect that there must be more to infinity than illusion. If there were not, we would not be here to have this discussion.
