Can John Stuart Mill shed light on academic freedom? What did Wittgenstein mean by “the decisive move in the conjuring trick”? How does Twitter foster intimacy—and get us into trouble? Also: Lisa Herzog on the epistemological value of markets, Kyla Ebels-Duggan on Dietrich Bonhoeffer, Sally Haslanger on Amia Srinavasan’s The Right to Sex. Cover illustration by Emily C. Bernstein.