 One possible response is to insist on Regularity and hold that the agent in the Coin Case is actually incoherent in a subtle way. Namely, that agent’s credence in “the coin is fair” should not be zero but should be an infinitesimal—smaller than any positive real number but still greater than zero (Lewis 1980). On this view, the fault lies not with Regularity but with the standard version of Probabilism, which needs to be relaxed to permit infinitesimal credences. For worries about this appeal to infinitesimals, see Hájek (2012) and Easwaran (2014). For a survey of infinitesimal credences/probabilities, see Wenmackers (2019).