 One debate concerns whether hot, emotion-driven reasoning is necessarily better or worse than reasoning based only on cooler, more reflective thinking—a distinction sometimes referred to using Kahneman’s terminology of system 1/system 2 thinking. The terminology is not perfect, though, because Kahneman’s terms map onto a quick, automatic, unconscious system of judgments (system 1) and a slow, effortful, deliberative decision-making process (system 2), and as we saw above, this is not a distinction between emotion and reason, since rule-based judgments can be automatic and unconscious while emotional judgments might be effortful and conscious. The debate between Mikhail and Haidt is a debate over the extent to which emotions rather than rules explain our moral judgments; Singer and Greene’s arguments against deontology rest on the claim that emotion-backed judgments are less justified than their utilitarian counterparts.