2. The truth should be "reasonable". The truth you tell your children should be reasonable. You can't talk nonsense or make it difficult for them, because adults talk nonsense and children won't be convinced. Adults' demands are too harsh for children. For example, some parents in life like to eat snacks themselves, but they don't listen to their children when they tell them the disadvantages of eating snacks.
Give your child a chance to defend himself. When reasoning with children, children may defend their words and deeds, and adults should give them a chance to defend themselves. Understand that defense is not an argument, but an opportunity for children to explain things clearly and to defend themselves, so that children will better understand what you are saying and get good educational results.