Critical thinking is conceived in the theories as a skill that students consciously learn and practice while the teacher is positioned as the one who can teach students how to critique. However, one of the major insights gained through research conducted at a university in the Northern Territory is that students are already critiquing what they say and do in the classroom as they negotiate a position in relation to the lecturer as an authority. The research finds that critical thinking is not just a cognitive attribute, it is constituted through a practice that is always at work, albeit in hidden ways in the classroom. It is through this hidden practice of critique that indigenous students at this university speak and learn outside an assimilation to the power and knowledge of the non-indigenous teacher.