 Kilwardby adopts Robert Grosseteste’s distinction between four main senses of ‘to know’ (scire: (i) in a general sense, the comprehension of the truth of contingent things, (ii) in a common sense, the comprehension of the truth of things that often are, (iii) properly, the comprehension of the truth of things that are immutable, (iv) most properly, the comprehension of the truth of things that always are the same and the truth of which depends on what is prior (NLP I.5; Silva 2012, 216; Corbini 2013, 166). So, whereas in a sense to know can be said of sense perception, it is properly and most properly said of what is universal and of what is necessary (DOS 379). Such knowledge is found in the premises/principles and above all in the knowledge of the conclusions of demonstrations (iii and iv, above). Scientific knowledge (scientia) is then more properly demonstrative reasoning (DOS 381).