Invited commentary Amade M'charek on panel Foundation of Difference II: Science for Annelies Kleinherenbrink’s contribution ‘Sex Matters: Notes on Feminism and Neuroscience’ and Veronica Vasterling’s contribution ‘The Science of Sex Differences’. Symposium Interdisciplinary Gender Studies and the Foundations of Difference. Radboud University, Nijmegen, the Netherlands.