It used to be easy to figure out what was a sport/utility vehicle: Whether it was as bare-bones rugged as a Jeep or dripping with high-tech luxury like a Range Rover, an SUV boasted the all-wheel drive and the ground clearance needed to take you places roads didn't go. But as the largest group of contenders ever assembled for a Sport/Utility of the Year shootout - 22 in all - gathered for evaluation at the Emergency Vehicle Operations Center driver training facility in San Bernardino, California, it became clear the segment has rapidly evoloved into soemthing less rigidly defined.