The person’s body remains rigid, with their arms close to the torso and their fingers stretched and spread out delicately as they give subtle emphasis to language. The wrists will remain fluid and the hands will accentuate using very precise and dexterous mannerisms.
This signal reveals a psychology that is currently trying to relay the interrelationship between elements of a sophisticated internal logical/ethical framework. The precision reflected in their hands is analogous to the mental precision they are currently involved in conveying. They are engaging in a refinement of definition and interpretation for their thoughts and words.