Reliable hardware/software systems depend on the free flow of information. Recently I had to control a piece of hardware that did not return any status information. It then became a guessing game as to what state it was in. Although I could not completely solve this problem, I was able to improve on it.
If you are interested, please see
https://rick.sparber.org/ShadowModel.pdf
Your comments are welcome. All of us are smarter than any one of us.
Thanks,
Rick
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