Ask people their opinions, to help build their self-confidence.
Ask them for favors, to arouse their cooperativeness.
Answer their question by turning it back on them.
Ask them “and, in addition to that?” to get to the bottom of things.
Try giving orders in the form of questions to keep cooperation.
Make suggestions to the boss in the form of questions.
Ask questions that will let people talk themselves into a cooperative attitude.
Ask Questions to win cooperation.
~ Donald and Eleanor Laird, The Technique of Handling People (1943)