English Original
One day, a father asked his eight-year-old son to mail a letter. The boy took the letter and ran off. Only then did the father remember that he hadn't written the address or the recipient's name on the envelope.
When the son returned, the father asked him, "Did you put the letter in the mailbox?"
"Of course," the boy replied.
"Didn't you see that there was no address or name on the envelope?"
"I certainly saw that nothing was written on it."
"Then why didn't you bring it back?"
"I thought you didn't write the address because you didn't want me to know who you were sending the letter to!"
中文翻译
一天，父亲让他八岁的儿子去寄一封信。男孩拿着信就跑开了。这时父亲才想起来，他忘了在信封上写地址和收信人的名字。
儿子回来后，父亲问他："你把信投进邮筒了吗？"
"当然。"男孩回答。
"你没看到信封上没写地址和名字吗？"
"我当然看到上面什么都没写。"
"那你为什么不把它拿回来呢？"
"我以为你不写地址，是因为不想让我知道你要把信寄给谁！"