  Aristotle extends his discussion to opinions, arguing that not all opinions are equally authoritative. Aristotle points out that when it comes to questions about our future health, the opinion of the physician is not on a par with a lay person. Nor are our senses equally authoritative on the same subject matter. Each sense is authoritative about its own special objects. For example, sight, and not taste, is the authority on color, but taste, and not sight, is the authority on flavor (Metaph IV 5 1010b11–17). According to Aristotle, then, it is far from unclear which appearances, or whose opinions, are to be trusted in cases of conflict. Those who profess to deny this, show, by their own actions, presumably by trusting only their waking appearances when they are awake, and by consulting a physician when they are ill and so on, that they believe quite the reverse. Therefore, according to Aristotle, the second premise of the argument from conflicting appearances is false, and so the argument fails.