Quantum physicists can either know when they do it, or with how much energy they do it, but not both. Real analysts Real analysts do it almost everywhere Real analysts do it uniformly. Ring theorists do it non-commutatively. Ring theorists do it ideally. Set theorists do it in a morass.
Set theorists do it with cardinals.
Statistical physicists Statistical physicists do it with partitions. Statistical physicists do it near equilibrium. Statistical physicists do it in ensembles. Statisticians Statisticians do it continuously but discretely. Statisticians do it when it counts.