Three talented people passed the exam, what does one finger mean?

All passed the exam

Once upon a time, three scholars went to Beijing to take the exam. On the way, they met a fortune teller who was called a "living god" and went to ask for advice: "Can we take the exam this time?" How many will you hit?" The fortune teller closed his eyes and counted for a while, then raised his finger. The three scholars didn't understand what it meant and asked for clarification. The fortune teller said: "Don't leak the secret, you will understand it in the future."

Later, only one of the three talents passed the exam. God, he really deserves his reputation." He also raised his finger like the fortune teller and said, "It's true that he only won one." After the scholar left, the fortune teller's wife asked him, "Why are you so good at telling fortunes?" The teacher chuckled and said, "You don't understand the mystery. You can give multiple explanations by raising a finger: if all three of them pass the exam, it means 'all passed'; if none of them passed the exam, it means 'all failed'" ';If one person passes the exam, it's a 'passed'; if two people pass, it's a 'one failed'. No matter what the actual situation is, it proves that my calculation is correct."

After hearing this, my wife said happily: "You have so many clever ideas, I am convinced by you."