Psychoanalysis was the most important intellectual development of the twentieth century, which left no practice from psychiatry to philosophy to politics untouched. Yet it was also in many ways an untouchable project, caught between science and poetry, medicine and hermeneutics. This unsettled, unsettling status has recently induced the philosopher Alain Badiou to characterise psychoanalysis as an 'antiphilosophy', that is, as a practice that issues...