We are the masters of the unsaid words, but the slaves of those we let slip out.

Cities are not loud. Cars are loud

Therefore, the best warfare strategy is to attack the enemy’s plans, next is to attack alliances, next is to attack the army, and the worst is to attack a walled city.

If you want to combat error, critique your in-group. You speak their language and they trust you, so you might persuade someone. If you want to raise your status, critique your out-group. They won’t listen, but your in-group will love it.