Quantifier accounts associate commitment to Ks with the existentialclaim '∃x Kx', which makes commitment to natural numbers entail commitment to integers — reversing the correct ordering.
Once one accepts that a “reality” predicate is needed to characterize ontological commitment, a puzzle about the logic of ontological commitment admits of a natural solution. The puzzle is this (from Fine 2009). Because the natural numbers are included within the integers, an ontological commitment to the integers, it seems, should be a stronger commitment than a commitment to the natural numbers. But quantifier accounts of ontological commitment get this backwards: since commitment to Ks is ass