the set of reals is an 'infinite set' (where the very concept of infinity itself is not well defined), whereas the set of software bugs is a finite set (because we have a finite amount of code in real life) so your (counter?) example has nothing to do with the situation under discussion. but for all i care, we can discuss infinite sets as well. start with that 'well defined' definition of reals (whose set theory are you going to use btw? ;), then also define what 'well defined' means then also define what 'defined' means. i think you're going to lose this argument, but don't let me stop you from trying ;).