Chapter 5 develops a uniform account of bare nominal arguments (i.e., bare numeral classifier phrases, bare classifier phrases, bare nouns) in classifier languages. It achieves that by extending the scope of discussion to more classifier languages. It starts with three points on which Mandarin and Nuosu Yi differ and which make this comparison interesting from the perspective of building a theory of cross-linguistic variation. Their differences are: (i) whether or not they have the function category D in their grammar, (ii) whether or not they freely allow numeral-less classifier phrases to appear in argument positions, as a result of applying covert argument formation operations unrestrictedly, and (iii) whether or not they allow one-deletion from the [one Cl N] phrase in the PF. Three parameters based on these differences account for the variation.