We act for reasons all the time. Here's an interesting question: (Q1) what kind of thing are those reasons our actions are based on?
We believe things for reasons all the time too. Here's another interesting question: (Q2) what kind of thing are those reasons our beliefs are based on?
Set aside those two specific questions for the moment. I want to ask a more general question about the relationship between the two questions.
(Q3) Is there a presumption in favor of Q1 and Q2 receiving the same answer?
If the answer to Q3 is 'yes', it opens the way for this type of argument (where 'K' is a placeholder for whatever the correct kind is):
- If epistemic reasons are Ks, then practical reasons are Ks.
- Epistemic reasons are Ks.
- Therefore practical reasons are Ks.
So what's the answer to Q3?
P.S. If you're wondering, "What type of reasons does he mean, normative or motivating?" I'd say, "motivating," though I really don't like that terminology.