deontic modality

Deontic modality refers to the way language expresses rules, permissions, or obligations. It indicates whether someone is allowed to do something, must do something, or should do something. For example, saying "You may leave" expresses permission, while "You must leave" indicates obligation. It helps us understand the speaker's attitude toward actions—whether they are permitted, required, or forbidden. Deontic modality is essential for conveying social norms, legal rules, or personal permissions in communication.