专家级用户很少使用它们，而新手则希望尽快摆脱这些令人不安的有关他们无知的提示，但是永久的中间用户则需要永久地面对它们。

• Experts rarely use them, and beginners soon desire to discard these embarrassing reminders of their ignorance. But the perpetual intermediate majority is perpetually stuck with them. Design Principle