Must -

: It serves as legal documentation for disciplinary actions. Experts at Indeed suggest that managers remain objective and factual rather than emotional during this process.

: It expresses a high degree of confidence in a conclusion (e.g., "It has been raining all day; the ground must be soaked"). : It serves as legal documentation for disciplinary actions

In formal and technical writing, "must" establishes a non-negotiable requirement. "It has been raining all day

: These are external expectations—what we feel we ought to do to please others or fit into societal norms. : It serves as legal documentation for disciplinary actions