An argument (expression) is a nominal or a person index that occupies an argument slot.
argument phrase (CXN) = a referring phrase that refers to an argument. Example: in The tree fell, the tree is an argument phrase because it is a referring phrase that refers to the argument of the predicate – namely, the tree that fell. Argument phrases are divided into core argument phrases (subject phrase, object phrase) and oblique argument phrases. (Sections 2.2.2, 6.6.1) ❡
argument (INF ) = a referent of which something is being predicated. Example: in Masha is nice, being nice is being predicated of the referent Masha, and hence the referent Masha is an argument. Most referents are also arguments, but it is possible for a ref- erent to “stand alone” in discourse, particularly in spoken discourse, independent of any predication. Arguments are divided into core arguments (subject and object) and peripheral arguments. (Sections 2.1, 6.1.1)