 But, if the boundary between humans and animals is located at the limit between sensory perception and the intellect, precisely because this limit is far from being well-defined, it is difficult to determine with precision the ontological difference between men and animals, to the extent that one can find some cases of true bestiality among humans: these cases are certainly rare, but not as rare as those men who are capable of living according to virtue and science (see Bianchi 2003b: 63–100). This is the context that explains much of the content of the Antoniana. In the opinion of its author, those who recognize that any animal perceives what seems to it desirable or harmful, and then acts accordingly initiating a movement in pursuit of it or escaping from it, are not only obliged to grant them a sensory faculty with a discriminating power, but even rationality and thought (AM: I.199). Moreover, given that Aristotle also distinguished an intellectual faculty devoted to apprehending simple objects and another one which can deduce the complex from the simple (so that one can built a true or false proposition from the connection of terms), then if we concede the first power to animals, we must also concede the second, since 