The Importance of Intuition

"I don't have very good answers to these questions, because I think ethics is hard," he says. "There are cases where killing people for the sake of preventing catastrophic harm to animals would be permissible." But his concern is if you don't have a value ratio or an equation for personality and defensive violence, then how do we know that we're above the threshold? He adds: We may take too much from our central thought experiment.