So you're the bouncer at the pub, you need to know that I'm over 18, instead of showing you my driving license, which shows you I know how to drive, what my name is, my address, all these kind of things, I show you my psychic paper, and all it tells you is am I over 18 or not.
如果你是酒吧保镖， 要知道我是否满18岁， 我不用出示我的驾照， 那就泄露了我会开车， 还透露我的姓名、地址之类的信息。 我给你看我的通灵卡片就可以了， 它只告诉你我是否已满18岁。