There also seems to be a difference in what they are claiming and what questions arise. Derrida is claiming to tell us what Rousseau's texts say or show, so the question that arises is whether what Rousseau's texts say is true. Foucault claims to analyse a particular historical moment, so the question that arises is whether his large generalizations hold for other times and places. Raising follow-up questions like these is, in turn. our way of stepping into 'theory' and practising it