My point is more that it’s not amazing, just something most people wouldn’t notice or think to try. Chalkboards were possible but harder, I think because of the distance—you don’t get the frequencies that don’t carry as well across a room. I could never really do it with whiteboards because they’re much quieter. And yeah, “clean your room” was definitely a safe bet, haha, then again we rely on context all the time when listening to speech too.