People · 1926
Lord Emsworth, whose IQ may be some thirty points below that of an absent minded jellyfish.
— P.G. Wodehouse · Lord Emsworth Acts for the Best

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
A comic put-down that measures a character's intelligence against a distracted jellyfish and has him losing by thirty points. The mock-precise number is the joke, painting him as wonderfully, hopelessly vague, and the absent-mindedness makes even a jellyfish look sharp.
Context reviewed