Abstract

In many areas of philosophy, it is becoming more and more mainstream to appeal or at least refer to social science research. For example, in moral psychology, the empirically informed approach is well established in the literature on moral judgment, moral emotions, and moral responsibility (Greene, 2013; Nichols, 2004; Prinz, 2007; Kelly, 2011; Doris, 2016; Roskies, 2006; Vargas, 2013). Does work in the social sciences have any bearing on philosophical questions about practical reason or reasoning? While there has been some excellent work that explores this question (e.g., Stein, 1996 ; Bishop and Trout, 2004 ), the growing empirical wave is less noticeable here. But this may not be because empirical research is irrelevant to the philosophical questions in the area. In this chapter, we will consider three questions about practical reason or reasoning that might be illuminated by attention to research in the social sciences. First, we’ll consider whether research on the role of sentiments on moral judgment is relevant to the philosophical debate between moral rationalism and moral sentimentalism. Second, we’ll consider whether research on the unconscious causes of action undermines philosophical views about the relationship between reasons and actions. Third, we’ll consider whether research on implicit bias is relevant to the normative question of how we can reason better. Along the way, we’ll see that when philosophical arguments and theories about practical reason make empirical assumptions – which they often do – empirical research can help to test these assumptions. We’ll also see that philosophical theories don’t always make the assumptions they are accused of making by their critics. Finally, we’ll see that we can make better prescriptions for how to reason better if we have a better sense of what we’re doing wrong.