He's saying that beating children doesn't help because they cannot be negotiated with. Children don't have the brain development to respond to threats. It's lik

He's saying that beating children doesn't help because they cannot be negotiated with. Children don't have the brain development to respond to threats. It's like beating someone with an epileptic seizure until he stops. That doesn't mean disruptive behavior doesn't have to be or can't be dealt with, just that beating children ('so they'll think twice next time') doesn't have positive effects (i.e. it doesn't stop or prevent the behavior next time) but it does have negative effects (teaches violence, weakens the trust bond, etc.)