On the agent-relativity thesis, what an agent ought to do is a function of the evidence available to her about the consequences of her potential actions. On the objectivity thesis, what an agent ought to do is a function of what the consequences of her potential actions would be, regardless of the evidence available to her. This article argues for the agent-relativity thesis. The main opposing argument, due to Thomson, points to cases where a bystander can see that an agent (...) is about to do something which, unknown to the agent, would have terrible consequences, and says to the agent: "You ought not to do that!" The bystander's utterance seems true, but it is argued that this is consistent with the agent-relativity thesis, which also enjoys support from other directions. (shrink)