Well, I work as a bartender, and here in Finland it’s strictly against the law to serve alcohol to, or even allow a “visibly intoxicated person” to enter the premises (a law which almost every bar breaks at some point, intentionally or no), and I think I’ve witnessed multiple times myself how a customer’s level of intoxication reveals itself only after you have served a drink to them and they’ve payed for it. Could it be called a Schrödrinker’s cat?