# Are questions about apparent errors in textbook answer keys appropriate here?

I understand that these are sometimes quite narrow, but as often as not it may be the case that there is no error, and that the perception of one is an opportunity to expose some deeper concept.

Of course, an attempt should clearly be made to locate any corrections to the apparent error that might be available before asking.

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Nothing wrong with: "Here's problem X from book Y. Here's what I did: [...] However, the answer key says Z. I checked for errata and did not find any on the web. Did I make a mistake in my solution?" –  Arturo Magidin Sep 17 '11 at 21:20
I think this is an excellent kind of question. –  Stefan Smith May 5 '13 at 16:32