Conceptual Engineering: Be Careful What You Wish for

Many trans women (men) say that they know that they are women (men). Anti-trans activists deny the claims trans people say they know. Many say that social kinds like woman, Latinx, and consent are in some important sense constructed in the social world and are thus open to a certain amount of engineering. I think the claims to knowledge trans people make are correct, and I think it correct that such things as gender, race, and consent are constructed by society and so are prime candidates for what philosophers these days call conceptual engineering. But it is not all that easy to see how the claim about knowledge and the claim that what is known is determined by the vagaries of the social world are to be reconciled. In this paper I argue that this is a real problem, that it has a solution, and that the solution tells us something important about what happens when we contest norms or engineer concepts.