@fresco,
fresco wrote:Quote:Absolute zero is the theoretical temperature at which entropy would reach its minimum value. The laws of thermodynamics state that absolute zero cannot be reached because this would require a thermodynamic system to be fully removed from the rest of the universe.
Wiki
Not to labour the point, I still think this puts "absolute zero" in the realm of "abstraction". I have no problem with that with respect to
my definition of "existence, but I am suggesting that it might for "a realist". What is the difference, if any between "God as a prime mover, standing outside the universe" and "a thermodynamic system standing outside the universe" ?
If you wish to consider absolute zero to be in the exclusive realm of abstractions because it cannot be obtained, then you would be wrong in the sense that is has a foundation in scientific methodology, empiricism and mathematical calculation. By your argument any measurement or calculation which does not have a definitive resolution cannot be other than an abstraction.
So let's consider the resonant frequency of a series RL circuit (that's when inductive reactance equals capacitive reactance and the inductor and capacitor are connected in series). Because the calculation uses pi the answer can never have complete precision. However that in no way stops electricians (like me!) from correcting power factor, nor electronics guys (like me!) from building equalizers.
Further your claim that absolute zero cannot be reached is in itself an absolute.
You ask "What is the difference, if any between God as a prime mover, standing outside the universe and a thermodynamic system standing outside the universe?"
OK I'll try; god (by some people's definition at least) would be a supernatural-omniscient-omnipotent-universe-creator whereas a thermodynamic system standing outside the universe would be a way to envision how absolute zero might be obtained irrespective (one might well argue) of it's present scientific plausibly.