 Davidson presents these claims about definitional reduction as facts which “provide at best hints of why we should not expect nomological connections between the mental the physical” (Davidson 1970, 217). If definitional reduction of this kind were in fact impossible, it would rule out the possibility of a subclass of strict psychophysical laws—those relating mental states with non-intentionally described behavior—but the basis for this impossibility would not have been explained. In fact, however, without knowing what that basis is supposed to be, we have no reason to accept Davidson’s claim that definitional reduction is indeed impossible. What prevents us from articulating all the required caveats? Without a rationale in hand, nothing prevents a reductionist from simply offering us detailed definitions and challenging us to come up with counterexamples. Something both principled and convincing is clearly needed. Davidson’s concerns about definitional reduction are ‘hints’ concerning nomological reduction only in the sense that they draw out our intuitions about something standing in the way of formulating such laws. What that obstacle is needs clear formulation.