 According to rule of thumb particularists, one need not give up the use of all moral principles in moral deliberation, because there are some false moral principles that are reasonable to employ. Margaret Little, for instance, thinks that there are no true moral principles (not even principles that express pro tanto reasons or obligations), but that there are false, defeasible principles that can nevertheless provide presumptive epistemic warrant for moral beliefs. Little holds that we can know with reasonable certainty—on the basis of experience and testimony—what sorts of contexts we’re likely to encounter, as well as which features tend to count as reasons (and for what) in those sorts of contexts. She writes,