Re question <100698-82>...
--- In quizbowl_at_yahoogroups.com, plujan <no_reply_at_y...> wrote:
> Hmm. Well, hopefully R. won't mind my posting the first sentence:
>
> "6. Considered as subsets of the real line, this term describes any
> single point or countable set, any interval that includes its
> endpoints, and any finite union of such sets."
>
> So, the question is indeed flawed, as there do exist sets which are
> countable but not closed.
After reading this thread I just sent a note to (errata at naqt dot
com) mentioning this. Someone else probably e-mailed it to that
address but better multiple mentions than none.
Anyone else who spots a problem with an NAQT question is encouraged
to send it to that address so that the problem can be fixed
promptly. All the better if you can include the question number
(e.g. "100698-82"), or at least the packet set & round.
Matt