Is it required that “rise” and “fall” be boolean/digital operations? I think it would be more reasonable to characterize them as analog/continuous. That could t

Is it required that “rise” and “fall” be boolean/digital operations? I think it would be more reasonable to characterize them as analog/continuous. That could then lead to infinite variations in rates, even just with a single character. And that’s before considering whether the characters and reader are correct in determining their current trajectory—much as in real life.