In her internаl mоnоlоgue, Myrrhа reаsons: "For all the creatures it is natural / When the bull mounts the heifer, his daughter, / Neither feels shame. / A stallion fights to breed from his own daughter... / Man has distorted that licence / Man has made new laws from his jealousy / To deprive nature of its nature." What does Myrrha's argument from animal nature most directly reveal about the structure of her reasoning?