There are other signs that might lead you to believe that there's things not as they might be, the legs may not be equal length  particularly if only one is dislocated and that's fairly obvious isn't it because the, the, the ball joint's not in the socket and there's a bigger gap so the leg hangs down longer  and you've all changed a baby haven't you and you see that they've got little creases in the insides of their legs and across their buttocks, and those creases may not be a mirror matching  they are normally, so those are clues.