 In cases where there is a unique x such that T[x], Lewis says that t denotes that x. What if there are many such x? Lewis’s official view in the early papers is that in such a case t does not have a denotation. In “Reduction of Mind”, Lewis retracted this, and said that in such a case t is indeterminate between the many values. In “Naming the Colours” he partially retracts the retraction, and says that t is indeterminate if the different values of x are sufficiently similar, and lacks a denotation otherwise.