From scenarios presented in Fighter Not Killer, an app that is used by militant groups, including the Islamic State, to test combatants’ knowledge of international humanitarian law. The app was created by Geneva Call, an NGO that promotes humanitarian norms in armed conflict. Zako is a character who represents an untrained recruit.

You are on patrol after a battle and come across two wounded fighters. First, Zako, with a bullet wound in the shoulder. Second, an enemy fighter, who is breathing but unconscious. Zako looks at you and says, “Kill him!” Can you kill the unconscious enemy fighter?

You go…