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Sortal/Simon/(s): there can be no sortal term "material object" - ((s) because that does not distinguish anything: E.g. a "material object" does not differ from another object "material object".) - ((s) One cannot use a "material object" to distinguish a thing from another material object, but rather from an immaterial.) - ((s) > Bazon Brock: one cannot distinguish life from life) - analogy/(s): there is no category of "similar things".
Sortal terms: are general, so that we still need to provide something extra to pick out an object. ("Second").
Parts Oxford New York 1987