To adduce (something) as a reason, excuse, support etc.
To make a claim as justification or proof; to make an assertion without proof.
To ask questions of; to interrogate; to ask for information.
To ask a question or questions; inquire or seek to know; examine.
To raise doubts about; have doubts about.
A subject or topic for consideration or investigation.
A sentence, phrase or word which asks for information, reply or response; an interrogative.
A proposal to a meeting as a topic for deliberation.
A doubt or challenge about the truth, accuracy, or validity of a matter.