 What allows us to say that the rule explains and rationalizes the behaviour is an act of inference from the rule to what it requires in particular contexts. But inference is, according to Boghossian, “an example of rule-following par excellence” (2012: 40), which indicates that the act of inference must fit the intuitive characterization above, thus requiring a further act. A regress is unavoidable for the proponent of non-reductionism, according to Boghossian. This is the inference problem.