Axiomempiricalv1
There exists a window of approximately 200 milliseconds
There exists a window of approximately 200 milliseconds between conscious awareness of an initiated action and the point of no return for that action.
Why This Is an Axiom
This is Libet's empirical finding about the veto window — the 'free won't.' It's a specific, measurable neurological fact that grounds the entire override mechanism. Not derivable; it's direct experimental evidence about timing of conscious intervention.