There is in addition the rather important matter of trust. If Hartley were to act in a similar fashion against Wales or Australia in the pool games, be sent to the sin bin or, worse, sent off, then all that World Cup planning could turn to dust there and then through one act of stupidity. Discipline is not only an ethical stance, it is also a practical imperative. Champion sides do not give away daft penalties. And they most certainly do not end up in the dock on yet another charge.