Definition of "unanswered"

The timing of the incident raised the question, almost certainly destined to remain unanswered, of whether, having allowed the escapers to pass by unhindered, the culprit had waited specifically for the yellow jersey group before sowing his mischief.

2012 July 15, Richard Williams, Tour de France 2012: Carpet tacks cannot force Bradley Wiggins off track‎, Guardian Unlimited