What we all can agree on is 0.999...(infinity) = 1 on an the conditions set up in axiom of choice, and the joke itself is really bad.
This joke was actually told to me by an acquaintance, to teasingly equate kids with "true" mathematician. Mainly this is to show that "hardcore" mathematicians, supposedly, are never likely to get anywhere productive because they are controversial about everything, including the premises in the Axiom of Choice.
Here is a classic joke against engineers which is more straightforward to see:
Quote:When considering the behavior of a howitzer:
A mathematician will be able to calculate where the shell will land.
A physicist will be able to explain how the shell gets there.
An engineer will stand there and try to catch it.
Nevertheless, these flame wars between chemists, mathematicians, physicists, computer programmer, and statisticians gets old really fast.