对话进行到这里，我看motivation也开始冒芽了， 就又“自然而然”地问：how do
you know if you write well then?
儿子说：Submit your writing and then see if it works.
我立马追问：how do you know if it works?
儿子说：If it moves towards the direction you want it to go?
我继续prompt: Give me an example.
儿子说：Say, you want to be elected the president. You write to ask people
to vote for you and you were elected.
