Perhaps I'm not communicating myself very well. To be blunt, the question could be worded as well as possible, that doesn't preclude the subject material from i

Perhaps I'm not communicating myself very well. To be blunt, the question could be worded as well as possible, that doesn't preclude the subject material from introducing a bias anyway. And given that the subject is relatively controversial and not 100% well-defined (we have no way of determining whether the use was "justified" or even actually defensive), that could indeed introduce a significant bias.