If motivating reasons are the contents of our mental states of believing, then the content (e.g., that it is raining) is itself a good reason, which satisfies the normative constraint.
Dancy (2000: 106ff.) considers a possible response: that acting for a good reason may simply require your motivating reason to be a mental state whose content is a good reason. So, you act for a good reason if your motivating reason for, say, taking your umbrella is your believing that it is raining, which is a mental state whose content—“it is raining”—is a good reason to take your umbrella. The success of this response to Dancy’s argument is unclear. On the one hand, if the response is that th