In any case, should I take your response as a denial that thermal de-coherence does, in fact, impress strict limits on QM phenomena / behavior?
We haven't determined exactly what those limits are but that is not a denial of your statement, I certainly accept boundaries. The question is are the boundaries material or mental? Since were having a conversation, do you mind just stating your position on this so I don't have to jump all over the place on what your getting at. I don't want to go in detail of for example Henry Stapp and others concerning decoherence not being problematic for Von Neuman's position if that isn't what your getting at. Why do thermal de-coherence boundaries some how falsify idealism from your perspective?
My main question, again as posed upthread is, what practical difference does it make?
I don't know where to begin. Our sense of self, free-will, personal responsibility, meaning, my response to Doc above for more, you really don't see that you have no free-will in a physicalist universe? Your nothing but a biological robot? And that even if you somehow swim in those psychological realities healthily, that your an exception and not the rule?
Our worldviews, our basic fundamental ontology or what is at the base of our reality from which we construct meaningful and supportive existential truths we all ask like the basic what am I? where did I come from? what is the universe? fundamental questions that further beg what is the underlying nature of reality? what is the meaning of my existence? etc.. This existential structure and framework from which we can build on our greater worldview is a very important aspect of most peoples lives. Our worldviews affect our personal happiness and meaning and give us hope. Society's greater zeitgeist or predominant worldview affects culture, economics, education and media.
And, it's damn interesting to boot!
If you wouldn't mind answering a question since you seem at least open to a mind/mental universe. http://henry.pha.jhu.edu/The.mental.universe.pdf Richard Conn Henry is quoted as saying, "The Mental Universe - Richard Conn Henry - Professor of Physics John Hopkins University
Excerpt: The only reality is mind and observations, but observations are not of things. To see the Universe as it really is, we must abandon our tendency to conceptualize observations as things.,,, Physicists shy away from the truth because the truth is so alien to everyday physics. A common way to evade the mental universe is to invoke "decoherence" - the notion that "the physical environment" is sufficient to create reality, independent of the human mind. Yet the idea that any irreversible act of amplification is necessary to collapse the wave function is known to be wrong: in "Renninger-type" experiments, the wave function is collapsed simply by your human mind seeing nothing. The universe is entirely mental,,,, The Universe is immaterial — mental and spiritual. Live, and enjoy." My question is, if this ontology, this metaphysics, this worldview is a more human flourishing and satisfying view - why would it not receive our acceptance, until it is absolutely falsified? Is fear that some people having a little too much woo for you really not overridden by the much more fulfilling, satisfying and dare i say just downright healthier view that we have a real spiritual life to pursue and find meaning in? That shouldn't be taken to mean we need to kneel down and accept Jesus either.
The physicalist view of ourselves and the universe is downright depressing and so if it isn't absolutely verified and true I'm no masochist.
mikwut