 Fundamental to Alyngton’s deduction of the categories and solution of the problem of what falls into the categorial fields (and how) is a close isomorphism between language (mental, written, and spoken) and the world. Like Burley and Wyclif, he was firmly convinced that our thought is modelled on reality itself, so that it reproduces reality in all its elements, levels, and inner relations. Therefore, one of the best ways of understanding the world lay for him in an accurate investigation of our notions and conceptual schemes, as they show the structure of the world. A logical consequence of this conviction was his strong propensity towards reification: he hypostatises the notion of being and considers equivocity, analogy, and univocity not only as semantic relations between terms and things, but also as real relations between extra-mental items (In Cat., cap. de aequivocis, ms. London, Lambeth Palace 393, fols. 69v–70r).