“…Metalinguistic proposals are speech acts that involve an intention for an audience to come to have a reason to use or understand the use of a linguistic expression in a particular way. They are related to what Barker (2002, p. 2) calls a "metalinguistic use" of language, which "communicate[s] something about how to use a certain word appropriately", and what Plunkett and Sundell (2013) call a "metalinguistic negotiation", or what Ludlow (2014) calls "lexical warfare", and they can play a role in what has been called "conceptual engineering" (Cappelen, 2018), "conceptual ethics" (Burgess and Plunkett, 2013), and "linguistic interventions" (Sterken, 2019). The following passage, which occurs in the context of an online debate over whether to use the expressions "battle rifle" and "assault rifle" to describe certain firearms, makes a metalinguistic proposal in its final line (linguistic errors and inconsistency in observation of the use/mention distinction are preserved from the original): * Thanks to Eliot Michaelson, Rachel Sterken, audiences at the Uppsala Online Speech Workshop, the New College for the Humanities Cognitive Science Research Group, and an anonymous referee for discussion of the issues in this paper.…”