Suppose a friend of yours had you over for dinner. His wife was laboring away in the kitchen all day long. When she unveils the prepared meal, your mouth begins to water, and you begin to feel hungry. At the same time, you are filled with dread, because you cannot eat the meal. She has prepared something to which you are allergic. You lament your failure to relay this allergy to her and offer your deepest apologies and you tell them that you are allergic to that entree. Your friend…