Public reason, values in science, and the shifting boundaries of the political forum

A consensus is emerging in the philosophy of science that value judgements are ineliminable from scientific inquiry. Which values should then be chosen by scientists? This paper proposes a novel answer to this question, labelled the public reason view. To place this answer on firm ground, I first redraw the boundaries of the political forum; in other words, I broaden the range of actors who have a moral duty to follow public reason. Specifically, I argue that scientific advisors to policy makers have that duty—a duty that is needed to create a barrier against any nonpublic values that scientific researchers might let enter their work. Next, I specify how scientific advisors should approach value judgements to satisfy public reason, arguing that they should work within a conception of justice that is political and reasonable in several distinct senses. Scientific researchers at large should instead communicate their value judgements by following norms of transparency that facilitate scientific advisors’ public reasoning. Finally, I contrast my account with the dominant response to the which-values question, which focuses instead on citizens’ values, demonstrating that that response shares several problematic features with the heavily criticised external conception of public reason.