"How is it, have you learned anything?" With half an hour left, Fang Bai directly collected all the cards.

"Hey, Teacher Fang, you're so bad!"

"That's it, teacher, you're so insidious!"

"It's so bad, I've never seen such a bad person as you, teacher. ”

The little radish heads below complained one after another.

In this regard, Fang Bai had to touch his nose stupidly.

Xia Yuli suddenly raised her hand.

"Teacher, I think what you told us is the same as the one you said last time, don't be presumptuous. ”

"Well, yes, it's not all right!" Fang Bai nodded, "Actually, this is called habitual self-righteousness. ”

"Why is it called habitual self-righteousness?"

"Do you know why I didn't stab myself when I got the werewolf for the first time?"

Fang Bai once again threw out a question.

"I know, because everyone doesn't know how to play at this time!" said Hu Shuo excitedly raised his hand.

"Almost, at the beginning, everyone was familiar with the rules of the game, werewolves, the first night they liked to kill good people, and witches, they thought that the people they saved would be good people. ”

"It's a habit. ”

"Habit is not a good thing, but it is not a bad thing either, but the teacher hopes that everyone will not judge something with their own experience preconceived notions, so it is easy to make mistakes. ”

Looking at these thoughtful little radish heads around him, Fang Bai decided to tell another story to help these little radish heads understand.

"Now, the teacher will tell you a story. ”

Hearing that the big devil was going to tell a story, all the little radish heads couldn't help but sit up straight.

"There were three people who went to stay overnight, thirty yuan a night, and each of the three people paid ten yuan, and made up enough thirty yuan to give to the boss, and then the boss said that it was only twenty-five yuan today, so he took five yuan and handed it to the waiter, and asked the waiter to push it to these people. ”

The waiter secretly hid two dollars, and each person returned one dollar. ”

"In this case, everyone started to pay ten yuan, and then returned one yuan, that is, each person took out nine yuan, and three people took out twenty-seven yuan, plus the two yuan hidden by the waiter, it is twenty-nine yuan, so where did the other one yuan go?"

This little story told by Fang Bai is a very classic preconceived story on the earth, if you follow the flow of this story, you can't get the answer, but if you count it from the back to the front, then it is very simple.

Hearing the story of the big devil, all the little radish heads couldn't help but take out paper and pen and began to compare, but after a long time, the heads of these little radish heads couldn't turn around.

I had to look at Fang Bai helplessly.

"I don't know ......"

"Where the hell did this money go?"

"It's just, I've been calculating for a long time, but I can't figure it out. ”

But Zhang Zihong looked at the numbers on his paper thoughtfully, and frowned, "Teacher, it shouldn't be counted like this!"

"Oh?" Fang Bai smiled and looked at Zhang Zihong, "How should that be calculated?"

"If we want to divide this money, we have to calculate it from two directions, if we count thirty yuan, these thirty yuan are the twenty-five yuan taken by the boss, the two yuan taken by the waiter, and the one yuan taken by each of the last three people, which is the thirty yuan that the three people took out at the beginning. ”

"What about another angle?" Fang Bai asked,

"It's twenty-seven dollars, the boss's twenty-five dollars plus the waiter's two dollars. Zhang Zihong replied that after mixing around at the bottom, Zhang Zihong was already very actuarial about this kind of problem.

"Very good, actually, this is also very simple, we just need to see how much money the three of us spend!"

"We just need to see the three people as a part, the boss and the waiter as a part, and the problem will be solved. ”

"The three of them were given thirty yuan at the beginning, the boss and the waiter got twenty-seven yuan, and finally the remaining three yuan was returned. ”

"In this way, do you understand a lot?" Fang Bai asked.

Under Fang Bai's explanation, the little radish heads nodded one after another, and it was indeed easy to understand if they explained it like this.

"But...... Why couldn't we figure it out in the first place?" Chen Yue raised his hand and asked.

Because that's a preconceived notion, because the stories I tell come in a certain order, and you listen to my stories and calculate them in my order, and the answers you get are of course wrong. ”

"If you just jump out and look at the problem in reverse, wouldn't it be much simpler?"

Fang Bai shrugged his shoulders and said.

"Speaking of which, it still comes down to four words of self-righteousness!"

"So what...... Do you understand what's going on today?"

Fang Bai smiled and looked at the little radish head with a bitter face below.

"Home!Court!Work!Karma!"

All the little carrot heads sighed, this seems to have formed a convention, every time the big devil teaches something new, he will definitely let him write a homework, alas, I don't know when such a day will be a head.

"Uncle teacher, how far have you and my aunt developed?" On the way home from school, Fang Bai held the children's hands.

"Ahem...... Huh?" Fang Bai pretended not to hear.

"It's just that...... Did you kiss it?" Luo Xue asked shyly.

Do you know that your aunt almost abolished your uncle and teacher?

"This ...... Not yet. Fang Bai shook his head and said.

"Then uncle, teacher, you have to hurry up, my aunt is chasing after a lot of people!" Luo Xue instructed like a little adult.

Can you tell me how tall the grass is on those people's graves?

"Okay, teacher, come on, come on, come on!" Fang Bai, who had no choice, had to deal with it.

"You must come on!" Luo Xue said with a clenched fist.

"Well, the teacher must come on!"

......

On the side, the Shadow Guards quietly listened to the conversation between the two masters and apprentices, these Shadow Guards had become more and more restless recently, and had already taken care of Fang Bai's lifelong affairs.

"You say, let's tie up her aunt and then drug her!"

"And then tied up the lord too?"

"By the way, do you still have that I love a piece of firewood?"

"Well, it's long gone, so it's a fart!"

"But I have a new one, the latest blue model, a day together!"

"I like this!"

"By the way, I think the teacher surnamed Mo in the main academy is very good, do you want to tie it up together?"

"And give the Lord more medicine?"

"Good idea...... Hey, hey, hey. ”