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by Tangurena 6259 days ago
Exactly, What the OP is looking for is some sort of "litmus test" to apply to candidates.

http://en.wikipedia.org/wiki/Litmus_test_(politics)

There exists no single question that is usable to filter good from bad candidates. Interviews are littered with nonsense like "what is your greatest weakness" because some idiot thought that to be some useful litmus test.