 Philosophers differ about the epistemic value of this project of perspective-taking. Thus some claim that there are certain facts that only show up from a first-person point of view (Nagel 1974), and hence can only be apprehended from that point of view. For instance, if I want to apprehend facts about “what it is like” to experience the world from your perspective, I arguably need to try to place myself, somehow, in that perspective. Others claim that certain concepts only show up for us from a first-personal, engaged perspective. For instance, perhaps the concept of chronic pain can only be acquired by someone who has experienced it, or the concept of romantic love, or racial bigotry. A related view is that while these concepts can perhaps be acquired without the relevant first-person experience, they cannot be adequately grasped or mastered without that experience. As Stephen Turner writes: