You've proven that the juggler's instructions alone are insufficient to juggle five balls. In this case, the juggler presumably has muscle memory you don't, whi

You've proven that the juggler's instructions alone are insufficient to juggle five balls. In this case, the juggler presumably has muscle memory you don't, which is equivalent to running an experiment on equipment that behaves differently. Or perhaps the juggler didn't convey the special trick you need for four or more balls.