Spears and shields and the problem of Zheng people buying shoes

Zheng Renbuying Lu: 1. A young man said to the great inventor Edison: "I have a great ideal, that is, I want to invent a universal solution that can dissolve everything."

lt; brgt;

lt; brgt; After hearing this, Edison asked in surprise: "What! What container do you want to use to place this universal solution? Can't it dissolve everything? "

lt; brgt;

lt; brgt; 2. There is a barber in a certain village. He stipulates: In this village, I only give and must give to those who are myself. People who don’t shave shave. I would like to ask: Will this barber shave me?

lt; brgt;

lt; brgt; This is the famous "Barber's Paradox" in the history of mathematics. Please analyze the logical contradictions contained in it.

lt; brgt;

lt; brgt; Analysis: Does the barber shave himself? There are only two situations: don't shave yourself, or shave yourself.

lt;brgt;

lt;brgt;If the barber doesn't shave myself, then according to his rules (I must shave those who don't shave themselves) ), he should shave himself. That is to say, starting from the fact that the barber does not shave himself, it must be concluded that the barber should shave himself, which in itself constitutes a logical contradiction.

lt;brgt;

lt;brgt;If the barber shaves himself, then according to his rules (I only shave those who do not shave themselves), He should just not shave himself. That is to say, starting from the fact that the barber shaves himself, it must be concluded that the barber should not shave himself. This is also a logical contradiction in itself.

lt; brgt;

lt; brgt; 3. A drug dealer selling "Shengfa Ling" is promoting the product "Shengfa Ling" vividly: "My 'Shengfa Ling' No matter what kind of baldness you have, you can make it grow hair, and the results will take half a month!" Just as he was touting his product, a gust of wind suddenly blew his hat off, and it turned out that he himself was bald! The customer asked, "Your hair growth elixir is so effective, why don't you let hair grow on your head?" The drug dealer was left speechless and dumbfounded.

lt; brgt;

lt; brgt; 4. A certain leader vowed to have a clean government. One day, someone gave him a gift, but he refused to accept it, so someone else gave him another gift. When the cash of 10,000 yuan came out, he took it and said, "How can I accept your gift? I won't do it again!"

lt; brgt;

lt; brgt; 5. The most famous one is the slogan: No gifts will be accepted during the Chinese New Year this year, only melatonin will be accepted as gifts!

lt; brgt;

lt; brgt; 6. A certain director claimed to be loyal to love and opposed extramarital affairs. On that day, he received a report at his mistress’s house from a colleague in the unit who had engaged in extramarital affairs. When asked about the divorce call, he said: Our company will never allow this kind of situation to happen.

lt; brgt;

lt; brgt; 7. Some people say that I have never believed in superstition, I have never believed in evil, I am not afraid of ghosts, I am upright, and I am not afraid of bad people, but when I go home at night At that time, he also asked a friend to take him back.

Einstein asked his assistant to calculate the volume of a light bulb, but his assistant used various formulas to calculate it and could not calculate it for several hours. Einstein poured water into the light bulb. , and then calculate the volume of water, the volume of the light bulb is calculated. Einstein’s assistant is Zheng Renmai, which is very mechanical.

Someone is going to the supermarket to buy something, and writes down what he wants to buy. On the paper, I forgot to bring the paper when I went there. When I went back to get it back, the supermarket was closed.