 While this characterizes “cat” as a sortal and “object” as a non-sortal, it also excludes some terms that are sortals by the counting criteria, e.g., garden hoses, rocks, piles of snow, sand dunes, amoeba and ice cubes. He also discusses the converse: G divides its reference just in case whenever a and b are G, the result of putting a and b together is never G.