 Note that the second response makes use of one’s ordering of comparative probability, which can be too nuanced to be fully captured by real-valued credences. As it turns out, such an ordering can still be fully captured by real-valued conditional credences (as explained in  supplement B),  provided that it makes sense for a person to have a credence in a proposition conditional on a zero-credence proposition. It is to this kind of conditional credence that I now turn.