See: <a href="http://en.wikipedia.org/wiki/Interesting_number_paradox" rel="nofollow">http://en.wikipedia.org/wiki/Interesting_number_paradox</a><p>'The paradox states that all natural numbers are interesting. The "proof" is by contradiction: if there exists a non-empty set of uninteresting numbers, there would be a smallest uninteresting number – but the smallest uninteresting number is itself interesting because it is the smallest uninteresting number.'
In reply to a dead comment:
The most common definition of natural numbers is "positive integers."
I do agree that 0 is important enough that it would have merited a mention at least.