 Presupposing the Perspectiva, in De scientia experimentali and in related works on the halo and on burning mirrors Bacon situates this new scientific practice as a desired area of study in the medieval university. It is consequent on the study of Perspectiva. Starting from Aristotle’s account of empeiria (experience), Bacon argues that logical argument alone, even when it originates from experience, is not sufficient for the “verification of things”. Even arguments that have their origins in experience will need to be verified by means of an intuition of the things in the world. He distinguishes scientific argument from moral and religious mystical intuition, although he does allow for the notion of a revealed intuition in science. It is this element that clearly separates Bacon’s practice from that of modern science. Just as in his concern with the certification of language to gain individual reference, so too in science, Bacon clearly wishes to have a way of certification for knowledge of the individual.