It is hard, sometimes, to follow epistemic rationality when it seems in conflict with instrumental one. Like, when a friend and colleague cries me a river about her ongoing problems, I try to comfort her but also to forget the details, in case I betray her confidence next minute speaking to our other coworkers. Surely epistemic rationality requires committing information to memory as losslessly as possible? And yet I strive to remember the voice and not the words.

(A partial case of what people might mean by 'rationality is cold', I guess.)