Just a comment: It seems to me category of the system (open, closed, or "cybernetic") is really just a matter of boundaries. If you have a "system" consisting of a "plant" (engineering model) with feedback and input and output, just include the feedback in the plant model and you end up with a system with just input and output. Zoom out again and include the inputs and outputs as part of the system and then you have a closed system.
I would suggest we DO live in a closed system consisting of the entire universe...
Notice that in general as long as there can be found an element within the system that has the features (input output feedback) the system boundaries can be shrunk down so that the process works in reverse. That's how I see it anyway...
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