 If the government of the United States believes (or were to believe) that there is a crisis of global warming, it would probably be justified in believing this, because of the overwhelming consensus of climate scientists to this effect. It is probably not required, however, that all members of a group must believe a given proposition in order that the group belief be justified, as Jennifer Lackey rightly says in criticizing the view of Frederick Schmitt (1994a: 265). It would make group justification too hard to come by (Lackey 2016: 249–250). But how, more precisely, should the requirement be specified?