 For another thing, Douven (1999) argues that the question of whether a probabilistic rule is coherent is not one that can be settled independently of considering which other epistemic and decision-theoretic rules are deployed along with it; coherence should be understood as a property of packages of both epistemic and decision-theoretic rules, not of epistemic rules (such as probabilistic rules for belief change) in isolation. In the same paper, a coherent package of rules is described which includes a probabilistic version of abduction. (See Kvanvig 1994, Harman 1997, Leplin 1997, Niiniluoto 1999, and Okasha 2000, for different responses to van Fraassen’s critique of probabilistic versions of abduction.)