The perfect mathematical pun doesn't exi— Wait, it does! This brilliant wordplay exploits the dual meaning of "cardinal" - both a Catholic Church official who elects the Pope AND a cardinal number in mathematics. The table hilariously lists mathematical notations (empty set, singleton, pairs, natural numbers, etc.) with the deadpan explanation that none can become Pope "because it is a mathematical object." It's the mathematical equivalent of dad jokes that somehow managed to escape a number theory textbook and infiltrate religious politics. Mathematicians everywhere are quietly chuckling while reaching for their calculators.