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Being slightly wrong is kind of the thing that makes an approximation an approximation

All models are wrong, some are useful. I found his explanation useful while knowing it was not correct

But this statement is wrong and should not be propagated: "pid 0 refers to myself".

pid 0 refers to the thing that is running 'myself', not to myself, itself. It is the thing which gave way to allow 'myself' to be executing in the current context.

It is more accurate to say "pid 0 is the source of cpu 'attention' which allows myself 'awareness'", as it discovered I was not idle, and granted me power to proceed with processing ..

I think generalization would have been a better word but everyone understands what they meant