Until now, there has been little experimental work investigating the processing and formal properties of the singular they suite of pronouns. As scientific and popular attention to singular they increases, it will be critical for research to acknowledge theoretical and ethical issues regarding discussion of this phenomenon. This commentary uses the recent paper by Doherty & Conklin (2017) as a starting point to discuss issues surrounding work on the various forms of singular they. It concludes that there is sufficient theoretical and empirical evidence to claim they has a grammatically singular form (at least in colloquial English). It also recommends care be taken in academic discussions of the grammaticality and acceptability of terms which are associated with marginalised communities.