Knock Knock jokes: Never mind, it's pointless #13

*Knock*Knock* / —"Who's there?" / —"A broken pencil" / —"A broken pencil Who?" / —"Never mind, it's pointless"
*Knock*Knock* / "Who's there?" / "A broken pencil" / "A broken pencil Who?" / "Never mind, it's pointless"
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