People
“Good,” said the judge, rapping his gavel three times. “I always have trouble remembering the long ones. How about ‘I am’? That’s the shortest sentence I know.”
— Norton Juster

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The gavel gives the moment an air of authority, but the judge's concern is simply remembering the words. 'Sentence' makes room for a joke about language inside a formal setting. The tiny 'I am' brings the conversation down to something almost comically manageable.
Context reviewed