 With regards to the lower limit of sense and the constructive part of the first Critique, Strawson examines Kant’s argument that our experience must be of recognisably independent objective items, which are spatial and temporal, and which must satisfy some strong principles of permanence and causation. Strawson argues, with both care and brilliance, that Kant’s arguments are defective in various ways, but that somewhat weaker, yet nonetheless important, conclusions along similar lines can be defended. The most fecund and brilliant part of Strawson’s argument, and the part which has correspondingly attracted the most attention, is Strawson’s take on Kant’s Transcendental Deduction of the Categories, in which Strawson argues that ‘for a series of diverse experiences to belong to a single consciousness it is necessary that they should be so connected as to constitute a temporally extended experience of a unified objective world’ (1966, 97). That is, the experience of a self-conscious creature must involve, and be recognised as involving, perception of objects. Strawson’s reconstruction of the argument relies on the idea that the experiences of a self-conscious creature must provide room for the thought of experience itself. But one can apply that notion only in the context of the application of categories of things which are not experiences. However, such categories can be available to a subject only if its experiences provide it with the grounds for applying them, which involves the idea that its experiences relate it to non-experiences, that is to say, independent things. This argument is discussed in Rorty 1970, Harrison 1970, and Gomes 2016.