Perfect Explanation
An exasperated explainer insists they explained it perfectly; the listener suggests understanding should be part of the definition.
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Cartoon by Ben Orlin, Math with Bad Drawings. https://cartoons.mathwithbaddrawings.com/2018-03-08-perfect-explanation/ (CC BY-NC 4.0)Transcript
A: "How do you not understand this? I explained it perfectly!"
B: "Maybe your notion of 'perfect explanation' should include 'person I'm explaining to understands it.'"