First things first. I want to thank Doug, Dave, Dan, and Josh for inviting me to come on as a contributor. I'm interested in connections between reasons for action and belief. For a while, I've been content to argue that at a certain high level of abstraction, we ought to expect similarities between reasons for action and belief. So, for example, if we can show that reasons for action belong in a certain ontological category, it would be surprising if the right account of reasons for belief located those kinds of reasons in an entirely different ontological category. If there's a gap between reasons and rationality on the practical side, it would be surprising if there were no similar gap on the theoretical side. (Of course, if there's no gap between reasons and rationality on the theoretical side, we ought to reconsider the suggestion that there's a gap on the practical side.) You get the idea.
What justification is there for thinking that claims about reasons for action justify claims about reasons for belief? I suppose you might say that the arguments that (purport to) show that there's a gap between reasons and rationality on the practical side show that there's nothing to the concepts of normative reason or rationality that require them to go hand in hand. If someone wishes to defend the view that there's no gap between reasons and rationality on the theoretical side, the onus would be on them. To paraphrase a remark of John Gibbons' from a forthcoming paper of his, there's a built in explanation of the similarities since both reasons for belief and action are reasons.
I'm interested to see if we can establish something stronger than just the claim that there's a burden of proof on those who wish to insist that reasons for action and belief differ in important ways. I've been kicking around an idea for the past few months and thought I'd see what sort of reaction it would receive here. Consider:
Link: If you oughtn't φ, you oughtn't believe that you ought to φ or that you may φ.
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