ABSTRACT
The simplest sentences of a natural language have two components: a subject and a predicate. Africa is a continent’ and ‘One-half is a natural number’ are examples. In the first ‘Africa’ is the subject and ‘a continent’ is the predicate, while in the second ‘One-half’ is the subject and ‘a natural number’ is the predicate. The verb ‘is’ asserts that the subject has the property described by the predicate; briefly that the predicate is applied to the subject, or that the subject is an argument for the predicate. The resulting sentence may or may not be true.
