Grandmother Ancestry
Someone is outraged that a genetic test says half their ancestors were grandmothers, which is true of almost everyone.
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Cartoon by Ben Orlin, Math with Bad Drawings. https://cartoons.mathwithbaddrawings.com/2018-11-19-grandmother-ancestry/ (CC BY-NC 4.0)Transcript
A: "This genetic test is absurd! They must have mixed up my sample." B: "What does it say?"
A: "It says half of my ancestors were grandmothers!" B: "Ridiculous. You don't look at all grandmotherly." A: "Thank you!"