 Sharpe rejects the standard realist criteria for the generality (or universality, according to his terminology) of terms, and substantially accepts the sense of nominalist criticisms. In his opinion, to be matched by a common nature really existing in the world is no longer the necessary and sufficient condition for being a general term. Rather, signifying universally (that is, signifying a unitary concept that in turn refers to a multiplicity of things displaying at least a similar mode of being [QsU, pp. 129–30]) is a condition for semantic universality of equal importance. He thinks that those terms which signify universally have to be viewed as common, as well as those signifying a common nature existing outside the intellect (ibid., p. 69). Thus, according to Sharpe, there are six different kinds of general expressions, both spoken and written: