first-person singular

Deductions

• grammatical category is for example first-person singular ⇐ (first-person singular is a grammatical category), (is a is inverse of is for example)
• first-person singular is a grammatical category ⇐ (grammatical person is subclass of grammatical category), (first-person singular is a grammatical person)
• grammatical person is for example first-person singular ⇐ (first-person singular is a grammatical person), (is a is inverse of is for example)