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Originally Posted by papageno
"Open system" means that the system is in contact with another system.
So it can exchange entropy with that other system.
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I guess my understanding was not exactly correct. What would you call a system that is infinite in both space and time? Is it open or closed? I understand well that in a closed system, entropy means that everything will eventually become equalized, but I'm not certain what would happen in a real infinite system.
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Originally Posted by papageno
Why?
Before proposing solutions, you need to make clear what the problem is.
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I'm not sure if I quite understand. I guess if I have to answer this, it would be something like, "a thought experiment." Or another, more , an infinite cosmos would seem more logical to me to one that is not infinite. Of course I realize that reality doesn't necessarily follow what we think it should. But it's the same with Santa Claus. My own personal feeling is that he doesn't exist, for my own logical reasons. But I'm perfectly willing to recognize his existence, if there is no other choice.