Americans are pre-occupied with salesmanship. Case in point. Gen. David Petraeus, the Army's top man in Iraq, says that sending military officers to civilian universities for Ph.D study opens their mind to four or five sides of an argument. A retired Lt. Colonel says anything beyond a Masters degree risks hurting an officer's battlefield judgement. He says such training led another Lt. Colonel to leave out of a counterinsurgency manual what he felt was an effective tactic: strapping dead insurgents to the front of tanks for locals to see.