The words “lā takhruj” may look the same while their social force changes with the speaker’s position and the likely consequences. The science of maʿānī studies precisely this relationship to context.
Authoritative ban: “Lā takhruj min al-qāʿah” — Do not leave the hall.
A friend’s request: “Lā takhruj qabla an nataḥaddath” — Do not leave before we speak.
In a threat: “Lā tasmaʿ kalāmī wa-satarā al-natījah” — Ignore my words and you will see the consequences.
The third statement does not genuinely grant permission to disobey; it warns of the results. Contextual evidence is therefore central to interpretation.