In which case, the function(s) should really be throwing some kind of error, since they can't reasonably be applied to the input. But checking !(isUppercase(st

In which case, the function(s) should really be throwing some kind of error, since they can't reasonably be applied to the input. But checking !(isUppercase(str) || isLowercase(str)) to see if its not case-able(?) is absurd Obviously you'd instead want the function notCaseable(str).