 In response to the first issue of “ought implies can”, Luther uses this as an occasion to bring out the folly of reason when it considers such matters, because reason thinks it can appeal to our ordinary use of words like “ought” and “must” to infer “can”—but Luther thinks that in fact even in ordinary practice, we can intelligibly tell someone they ought or must do something, knowing full well they cannot, as when a parent does so in order to demonstrate to a child the limitations of their ability, or a doctor in order to demonstrate such limitations to their patient. Luther argues that Scripture, unlike Erasmus, takes our human limitations very seriously, so it is therefore not surprising that such uses of command language abound, where Luther deals with many similar passages in the same way: 