NEITHER TRUE NOR FALSE "Serious computer and digital hardware
bugs caused by metastability have a fascinating social history.
Many engineers have refused to believe that a bistable device
can enter into a state that is neither true nor false and has a
positive probability that it will remain indefinite for any
given period of time, "
[1]
https://en.wikipedia.org/wiki/Metastability_in_electronics
I'm repeating this because I've been looking for this.
References
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1.
https://en.wikipedia.org/wiki/Metastability_in_electronics