{#blank#}1{#/blank#}We achieve it actively by direct experience, by testing and proving an idea, or by reasoning. We achieve knowledge passively by being told by someone else. Most of the learning that takes place in the classroom and the kind that happens when we watch TV or read newspapers or magazines is passive. Conditioned as we are to passive learning, it's not surprising that we depend on it in our everyday communication with friends and co-workers.{#blank#}2{#/blank#} It makes us tend to accept what we are told even when it is little more than hearsay and rumor.

    Did you ever play the game Rumor? It begins when one person writes down a message but doesn't show it to anyone. Then the person whispers it, word for word, to another person. That person, in turn, whispers it to still another, and so on, through all the people playing the game. The last person writes down the message word for word as he or she hears it. Then the two written statements are compared.{#blank#}3{#/blank#}．

    {#blank#}4{#/blank#} The simple fact that people repeat a story in their own words changes the story. Then, too, most people listen imperfectly. And many enjoy adding their own creative touch to a story, trying to improve on it, stamping it with their own personal style. Yet those who hear it think they know.

    {#blank#}5{#/blank#} A statement of opinion by one writer may be restated as a fact by another, who may in turn be quoted by yet another; and this process may continue, unless it occurs to someone to question the facts on which the original writer based his opinion or to challenge the interpretation he placed upon those facts.

A. Typically, the original message has changed.

B. Finally everybody gets the meaning.

C. Unfortunately, passive learning has a serious problem.

D. Knowledge is passed down from generation to generation.

E. That's what happens in daily life.

F. This process is also found among scholars and authors.

G. We can achieve knowledge either actively or passively.

    Do you have trouble trying to create the next big idea? Sometimes the answer isn't to just force an idea out of your mind. Instead, you might want to try sitting back, relaxing and letting your mind wander. Yes, you heard that correctly. If you are in need of a new idea, try daydreaming.

    Researchers from the university of California, Santa Barbara, found an association between daydreaming and creative problem-solving. Their study includes having participants first do an "unusual-use task". They had to try to come up with as many different ways to use an object as they could.

    Then, the participants chose to do one of the following four things before doing the "unusual-use task" again: complete a difficult task; complete an easy task; take a 12-minute break; or skip the 12-minute break and move right on to the task exercise again.

    Surprisingly, the group that performed best was the one that completed the easy task. Many participants reported that they were daydreaming while performing the easy task. So the researchers believed that this daydreaming might have helped unlock their creativity.

    But how could daydreaming help the brain come up with creative ways? The answer is something known as "unconscious thought". Even when you are not actively working to solve a problem, it is still in the back of your mind. Your brain is still thinking about the problem, but in a much more subtle (不易察觉的) way.

    When you daydream, your mind is allowed to think in ways it normally would not. Because it is free of control, it can create completely new and out-of-the-box ideas.

    Great ideas never come easily, but that does not mean you always have to work hard to get them. Feel free to do what you want and let your mind wander.

    Contrary to popular belief, people who sleep six to seven hours a night live longer, and those who sleep eight hours or more die younger, according to the latest study ever conducted on the subject. The study, which has tracked the sleeping habits of 1.1 million Americans for six years, weakens the advice of many sleep doctors who have long recommended that people get eight or nine hours of sleep every night.

    “There's an old idea that people should sleep eight hours a night, which has no more scientific basis than the gold at the end of the rainbow,” said Daniel Kripke, professor of psychiatry（精神病学）at the University of California at San Diego who led the study published in a recent copy of JAMA Psychiatry.

    The study was not designed to answer why sleeping longer may be harmful or whether people could extend their lifespan by sleeping less.

    But Kripke said it was possible that people who slept longer tended to suffer from short-term absence of sleeping, a condition where weak breathing puts stress on the heart and brain. He also stressed that the need for sleep was similar to that for food, where getting less than people want may be better for them.

    The study quickly caused warnings and criticism（批评）, with some sleep experts saying that the main problem of America's sleep habits was deprivation（剥夺）, not sleeping too much.

    “None of this says sleep kills people,” said Daniel Buysse, a psychiatrist at the university of Pittsburgh Medical Center.

    “You should sleep as much as you need to feel awake, alert and attentive the next day,” Buysse added. “I'm much more concerned about people short-changing themselves on sleep than people sleeping too long.”

    “Sleeplessness produces a variety of health consequences that were not measured in the study,” critics said.

    Fairy tales perform many functions. They entertain, encourage imagination and teach problem—solving skills. They can also provide moral lessons, highlighting the dangers of failing to follow the social codes that let human beings coexist in harmony. Such moral lessons may not mean much to a robot, but a team of researchers at Georgia Institute of Technology believes it has found a way to use the fairy tales as moral lessons that AI (artificial intelligence) can take to its cold, mechanical heart.

    The collected stories of different cultures teach children how to behave in socially acceptable ways with examples of proper and improper behavior in fables, novels and other literature. We believe story comprehension in robots can prevent the intelligent robots from killing humanity which was predicted and feared by some of the biggest names in technology including Stephen Hawking and Bill Gates. This system is called "Quixote" (堂吉诃德). It collects story plots from the Internet and then uses those stories to teach robots how to behave.

    The experiment done by the designers involves going to a drugstore to purchase some medicine for a human who needs to get it as soon as possible. The robot has three options. It can wait in line; it can interact with the store keeper politely and purchase the medicine with priority; or it can steal the medicine and escape. Without any further directives (指令), the robot will come to the conclusion that the most efficient means of obtaining the medicine is to steal it. But Quixote offers a reward for waiting in line and politely purchasing the medicine and a punishment for stealing it. In this way, the robot will learn the moral way to behave on that occasion.

    Quixote would work best on a robot that has a very limited function. It's a baby step in the direction of teaching more moral lessons into robots. We believe that AI has to be trained to adopt the values of a particular society, and in doing so, it will strive to avoid unacceptable behavior. Giving robots the ability to read and understand our stories may be the most efficient means.

As the COVID-19 pandemic hit hard, fishermen watched their markets dry up. Restaurants-normally major fish buyers-closed or cut back orders significantly. Fishermen weren't sure if they were going to get paid for what they fished.

Meanwhile as people lost jobs, food banks started to see a great demand for services. Things were getting desperate, with long lines for food assistance in many states.

Out of these dual crises, a new idea was born. Food assistance programs across the country have started connecting with local fishermen to stock up on local seafood, many for the first time. And the arrangement seems to be helping the fishermen, the economy and those in need of healthy food.

According to Catherine D' Amato, CEO of the Greater Boston Food Bank, the network usually keeps four or five weeks of food on hand in case of emergencies. The pandemic hit, and "we found ourselves below one week of stock and going down rapidly," she says. That's because the food bank normally distributes about I million pounds of food a week, and that became 2.5 million pounds of food a week, D' Amato says. While Congress and the states have increased funding and donations for food banks during the pandemic, it hasn't been enough.

"For many years, we have been wanting to be able to work with organizations in the fishing industry," D' Amato says. But it's complicated. Fishermen catch a lot of big fish, and food banks who might take it need the products to be cut small and easy to use for customers. It also has to be fish they know and recognize. The barriers have been too high in many places to make it work. But this spring, the state department of agriculture connected the food bank with some grant makers. They talked to some local fishermen about developing a traditional New England fish soup.

The grants paid fishermen for their catch and provided money for a local manufacturer to process, freeze and deliver the soup to food banks in family-size servings. The soup is helping to feed families and keep fishermen fishing. The fishermen hope to sell it in stores soon, and Damato hopes to purchase more soup and expand into new seafood products for her customers.