 At least three conditions must be met for an argument to be an instance of the sorites paradox. (1) It must be possible to construct a sorites series for the predicate in question, viz., a finitely-membered ordering of values on a dimension decisive of the predicate’s application. A sorites series for ‘tall’ is an ordering on the dimension of height (an ordering of heights), for ‘old’ an ordering on the dimension of age (an ordering of ages), and so forth. (2) Neighboring values in the series must be only incrementally different, i.e., either indiscriminable or just slightly different. An incremental difference is supposed to guarantee that if a vague predicate applies to one of a pair of neighbors, it applies equally to the other. (Following Wright [e.g., 1975], the property of applying across incremental differences on a decisive dimension is often called the tolerance of a vague term.) (3) The predicate must be true of the first value in the series and false of the last.