Siren of Indirect Proof
Odysseus, tied to his ship's mast, is tempted by the sirens' song of proof by contradiction while his crew begs him to resist.
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Cartoon by Ben Orlin, Math with Bad Drawings. https://cartoons.mathwithbaddrawings.com/2018-03-01-siren-of-indirect-proof/ (CC BY-NC 4.0)Transcript
Odysseus (tied to the mast): "The sirens are right! I can just prove everything by contradiction!"
Crew: "No, Odysseus! Don't listen!"
[Caption] "Many mathematicians have perished upon those rocks."