Shokitin: Verbal Categories: The Morphological Imperative: Second singular and second plural
The imperative and hortative moods share common verb morphology, which (like the indicative and other moods) marks plurality of the subject only when formal and/or negative. Person is never marked (in any paradigm). However, since the distinction between hortative and imperative is precisely between second-person and non-second-person, the imperative and hortative do not share any same-person and same-number morphology, thus the form qualifies as dedicated morphology. (The imperative and hortative moods, while marked the same way on the verb, have different syntax).
