An expression of inquiry that invites or calls for a reply.
An interrogative sentence, phrase, or gesture.
A subject or point open to controversy; an issue.
A difficult matter; a problem: a question of ethics.
A point or subject under discussion or consideration.

A proposition brought up for consideration by an assembly.
The act of bringing a proposal to vote.
Uncertainty; doubt: There is no question about the validity of the enterprise.

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