nominative case

Deductions

• grammatical category is for example nominative case ⇐ (nominative case is a grammatical category), (is a is inverse of is for example)
• case is for example nominative case ⇐ (nominative case is a case), (is a is inverse of is for example)
• nominative case is a grammatical category ⇐ (case is subclass of grammatical category), (nominative case is a case)