The robustness principle comes to mind: "Be conservative in what you do, be liberal in what you accept from others." You can save yourself a headache if you c

The robustness principle comes to mind: "Be conservative in what you do, be liberal in what you accept from others." You can save yourself a headache if you communicate as clearly and accurately as possible. At work, with friends, with a partner. I don't care what mumbling is a sign of, I care about its result. Don't optimize the wrong thing. Just like nobody likes seeing ugly JPEG artifacts, nobody likes to recognize mumbling.