 By contrast, if the dependence runs in the other direction—if we start off with a fundamental entity whose being can then ground the being of each subsequent entity—there is arguably no problem if that process continues ad infinitum: thus the infinite sequence where you start with a thing, form its singleton set, then form that thing’s singleton set and so on ad infinitum has not been thought to be objectionable by those who reject gunky objects, for it is the set that is ontologically dependent on its members, not vice versa. (See Fine 1994 for discussion of the direction of ontological dependence. See Cameron 2008 and Maurin 2007 for discussion of the difference between infinite regresses where ontological dependence runs upwards from ones where it runs downwards. Cf. Clark 1988, and also Johansson 2009 and the discussion in Maurin  2013.)[9]