It probably would have been a better question, but she would have likely given the same response she already had. She watched him for a long moment.
"I don't know what a walker is," she admitted with a shrug. But she definitely wasn't surprised that he killed them, given that he'd shot her when he thought she was one of them. She glanced at the arrow on the ground, covered in her blood. She was already healed. But he seemed to be taking that in stride rather than freaking out.