(i) the opposing perceptions and views of the world which characterize different species: “For how could one say, with regard to touch [for example], that animals are similarly affected whether their surfaces consist of shell, flesh, needles, feathers or scales? And, as regards hearing, how could one say that perceptions are alike in animals with […]

Modes of Skepticism are supposed to force you to suspend judgement because you cannot know or cannot be certain. These are variations on Pyrrhonism: based on the variety in animals; on the differences in human beings; on the different structures of the organs of sense; on the circumstantial conditions; on positions and intervals and locations; […]