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general::
Also, run true to form. Act as one expects, especially in keeping with previous behavior. For example, She ran to form, arriving an hour late, or The door-to-door campaign was running true to form, with solicitors always arriving at dinnertime. This term origi nally was used for race horses running as expected from their previous record; it was transferred to human behavior in the late 1800s.
American Heritage Idioms