Logical Subject and Logical Predicate.
354. The logical subject is the simple or grammatical subject, together with all its modifiers.
The logical predicate is the simple or grammatical predicate (that is, the verb), together with its modifiers, and its object or complement.
Larger view of a sentence.
It is often a help to the student to find the logical subject and predicate first, then the grammatical subject and predicate. For example, in the sentence, "The situation here contemplated exposes a dreadful ulcer, lurking far down in the depths of human nature," the logical subject is the situation here contemplated, and the rest is the logical predicate. Of this, the simple subject is situation; the predicate, exposes; the object, ulcer, etc.