The main objection to pragmatism about knowledge is that it entails that truth-irrelevant factors can make a difference to knowledge. Blake Roeber (2018) has recently argued that this objection fails. I agree with Roeber. But in this paper, I present another way of thinking about the dispute between purists and pragmatists about knowledge. I do so by formulating a new objection to pragmatism about knowledge. This is that pragmatism about knowledge entails that factors irrelevant to both truth and “cognitive agency” can make a difference to knowledge. An interesting additional upshot of my argument is the connection revealed between the debate between pragmatists and purists about knowledge, and the debate between “alethists” and pragmatists...