[krackers]

Not an interview question itself, but rejecting based on lack of "culture fit" seems to be pretty standard practice. I'm not sure why such a trick question is even needed however, since regardless of how the candidate does the decision to hire is ultimately a black-box that the candidate won't know anything about.

[matt_the_bass]

I think the OPis asking for something that can be used for internal debate/procedures, not the reason communicated to candidates.