"But no matter whether we are all in a still greater game, this one here before us is at a cruder grain than that which it models. Entire battles, and sometimes therefore wars, can hinge on a jammed gun, a failed battery, a single shell being dud or an individual soldier suddenly turning and running, or throwing himself on a grenade." Hyrlis shook his head. "That cannot be fully modelled, not reliably, not consistently. That you need to play out in reality, or the most detailed simulation you have available, which is effectively the same thing."