Public announcements in dynamic epistemic logic install hard certainty (probability 1), but empirical evidence routinely fails to warrant such certainty, making the logical model an idealization that Bayesian practice does not uniformly endorse.
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A certainty; something that is absolutely guaranteed to happen (as opposed to being merely likely).
Public Announcement(what creates certainty in the logical model)
A statement or piece of information that everyone hears and knows that everyone has heard it.
idealization(Pragmatist response to the quantum mechanics / molecular shape paradox)
A pragmatic simplification — such as treating an open system as closed — that is useful for practical purposes but does not accurately represent physical reality.
warrant(Toulmin's model of argumentation)
An implicit premise that an argument depends on, which licenses the move from evidence to conclusion; in this context, the unstated assumption that normal misdemeanor penalties are insufficient as a deterrent.