Eldritch Knight
Blue Belt
Well, its not so much a question of whether the kid can differentiate real from unreal as it is mere conditioning. Virtual or not, the kid's subconscious is being trained to aim and shoot at human-shaped objects. There are recorded instances of totally untrained people being able to make amazingly accurate shots without even thinking about it (based totally on FPS-built instinct - kill everything that moves). Remember back to when you were REALLY young? Isn't it a bit difficult to sometimes sort out what you saw on TV and what actually happened? That's simply because a young child's mind registers EVERYTHING that it sees as reality. You can tell a 5 year old all you want that its not real, but that doesn't help their learning subconscious very much.