What is the concept of knowledge for? What does it do for us? This question cannot be severed from considerations about what we do by using it. In this paper, I propose to view the point of our concept of knowledge in terms of a device for acknowledging epistemic authority in a social and normative space in which we share valuable information. It is our way of collectively expressing the acknowledgment we owe to others because of their being creditable when (...) engaged in the task of knowing. By using the concept of knowledge we are not just marking the epistemic positions we occupy, we are also acknowledging epistemic authority and indicating the advisability of taking oneself or others as “ready” for the transmission of authority. (shrink)