Downplaying the change of subject objection to conceptual engineering

Conceptual engineering projects have been criticized for creating discontinuities of subject-matter and, as a result, discontinuities in inquiries: call this the Change of Subject objection. In this paper, I explore a way of dealing with the objection that clarifies its scope and eventually downplays it. First, two strategies aimed at saving subject-continuity are examined and found wanting: Herman Cappelen’s appeal to topics, and the account in terms of concept function. Second, the idea is introduced that one can begin an object-level inquiry either with a ‘semantically conservative’ approach, whereby semantic change is not permitted, or with a ‘semantically progressive’ approach, whereby semantic change is permitted. This distinction helps one significantly downplay the Change of Subject objection.