⁴⁶ Peter Markie, ‘The Cogito and its Importance’ (CCD 140–73) explains how the Cogito can be interpreted as a combination of primary intuition (‘I think’) and immediate inference therefrom (‘I exist’), while pointing to various passages that seem to contradict this view, and that therefore, he thinks, require the interpretation to be modified. For an alternative analysis, staying closer to Descartes’s text, see Hatfield, Descartes andthe ‘Meditations’, 106–15. A quite different interpretation holds that the Cogito is to be understood in terms of performance: I grasp my existence in the act of attempting to doubt it: Jaako Hintikka, ‘Cogito, Ergo Sum: Inference or Performance?’, in Willis Doney (ed.), Descartes: A Collection of Critical Essays (London and Basingstoke: Macmillan, 1970), 108–39.