From the department of too-geeky-joke-to-be-funny comes the following one:

All natural numbers are special:

• 0 is special because it is the first natural number
• 1 is special because it is the neutral element for multiplication
• 2 is special because it is the first even number
• 3 is special because it is the first odd prime number
• lets suppose that there exists a non-empty set of non-special natural numbers
• we can take the minimum of this set – but this number is special because it is the smallest non-special number
• QED 🙂

(Original source – in Romanian)