Perspectivists tend to defend their position by reference to considerations of rationality. Agents are often in situations in which they don’t know all the relevant facts. And yet, perspectivists say, these agents often do what is reasonable or rational for them to do, given their perspective. If, as seems plausible, one acts rationally when one acts for reasons that make it rational for one to so act, then perspectivism must be right: agents who act in error or ignorance often act rationally an