The Banach-Tarski Paradox: where mathematicians prove you can theoretically cut a sphere into pieces and reassemble them into TWO identical spheres. The professor's response is peak academic humor - "You must be joking. This is well beyond the scope of this course." 😏
Translation: "I don't want to explain how we can mathematically duplicate matter because it would break everyone's brain and we'd never finish the syllabus." The smiley face at the end is the mathematical equivalent of dropping the mic.
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