Date: Jan 21, 2013 2:16 PM Author: Joe Niederberger Subject: Re: To K-12 teachers here: Another enjoyable post from Dan Meyer R Hansen says:
>The original name was actually "ARIEL" not "ARIEAL".
Exactly my point - plenty of room for simple mistakes.
Re-checking is about the only thing available to catch some kinds of errors. Some problems have a sort-of built in sanity check - like a crossword puzzle or jigsaw puzzle. Its not clear that this one does.