Socrates is not impressed. He insists that without knowledge and wisdom the rhetoricians may put to death whoever they want, but that doesn’t mean they are really powerful (466b). True power is being able to do what is really good for you. If a tyrant or a rhetorician, blundering in his ignorance, uses his so-called power to put to death those who try to give him good advice, then he is actually harming himself as well as his city.
