As we have seen briefly in the previous chapter, Badiou's central claim regarding Deleuze – that his philosophy is oriented around the thesis that Being is One – deviates substantially from a number of important moments in the latter's work. However, the strength of Badiou's argument is that the elaboration of this thesis takes place across a range of key concepts in Deleuze. In fact, these concepts mirror the four key concepts in Badiou's Being and Event: being (the One, the virtual), the event, truth and subject (thought). In other words, Badiou's claim is not simply that Deleuze's philosophy is explicitly a meditation on the single question of the One; indeed, he insists from the beginning of his text that the surface of the Deleuzean text is constituted by a massive profusion of particularities (cinema, Kafka, Kant, Carmelo Bene, mathematics, etc.). Badiou will even claim, correctly to my mind, that the word “Being” is one that Deleuze “only uses in a preliminary and limited manner” (DCB 28/45).