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Labels and Fables: How Our Brains Learn

One of the most remarkable capabilities of the human brain is its ability to categorize objects, even those that have little visual resemblance to one another. It’s easier to see that visually similar objects, like different trees, fit into a category and it’s a skill that non-human animals also possess. For example, dogs show distinct behaviors in the presence of other dogs compared to their interactions with humans, demonstrating that they can differentiate the two even if they don’t have names for them.

A fascinating study explored whether infants are able to form categories for different looking objects. Researchers presented ten-month-old infants with a variety of dissimilar objects, ranging from animal-like toys to cylinders adorned with colorful beads and rectangles covered in foam flowers, each accompanied by a unique, made-up name like “wug” or “dak.” Despite the objects’ visual diversity, the infants demonstrated an ability to discern patterns. When presented with objects sharing the same made-up name, regardless of their appearance, infants expected a consistent sound. Conversely, objects with different names were expected to produce different sounds. This remarkable cognitive feat in infants highlights the ability of our brains to use words as a label to categorize objects and concepts beyond visual cues. 

Our ability to use words as labels comes in very handy to progressively build more abstract concepts. We know that our brains look for certain patterns (that mimic a story structure) when deciding what information is useful to store in memory. Imagine that the brain is like a database table where each row captures a unique experience (let’s call it a fable). By adding additional labels to each row we make the database more powerful. 

As an example, let’s suppose that you read a story to your toddler every night before bed. This time you are reading, “The Little Red Hen.” As you read the story, your child’s cortisol level rises a bit as she imagines the challenges that Little Red Hen faces when no one helps her; and as the situation resolves she feels a sense of relief. This makes it an ideal learning unit to store into her database for future reference. The story ends with the morals of working hard and helping others, so she is now able to add these labels  to this row in her database. As she reads more stories, she starts labeling more rows with words like “honesty” or “courage”, abstract concepts that have no basis in physical reality. Over time, with a sufficient number of examples in her database for each concept, she has an “understanding” of what that particular concept means. Few days later when you are having a conversation with her at breakfast and the concept of “helping others” comes up, she can proudly rattle off the anecdote from the Little Red Hen. 

In other words, attaching labels not only allowed her to build a sense of an abstract concept, it also made it more efficient for her brain to search for relevant examples in the database. The figure above shows a conceptual view, as a database table, of how we store useful information in our brains. The rows correspond to a unit of learning — a fable — that captures how a problem was solved in the past (through direct experience or vicariously). A problem doesn’t even have to be big – a simple gap in existing knowledge can trigger a feeling of discomfort that the brain then tries to plug. The columns in the table capture all the data that might be relevant to the situation including context, internal states and of course, labels. 

Labels also play a role in emotional regulation. When children are taught more nuanced emotional words, like “annoyed” or “irritated” instead of just “angry”, they have better emotional responses. Research shows that adolescents with low emotional granularity are more prone to mental health issues like depression. One possible reason is that when you have accurately labeled rows you are able to choose actions that are more appropriate for the situation. If you only have a single label “anger” then your brain might choose an action out of proportion for a situation that is merely annoying. 

At a fundamental level, barring any disability, we are very similar to each other – we have the same type of sensors, the same circuitry that allows us to predict incoming information or the same mechanisms to create entries in the table. What makes us different from each other is simply our unique set of labels and fables. 

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The Science Behind Storytelling: Why Our Brains Crave Narratives

“Once upon a time…” These four words have captivated audiences for centuries, signaling the start of a story. But what is it about stories that so powerfully captures our attention and leaves a lasting impression? The answer may lie in the way our brains learn and process information.

How Our Brains Learn: A Baby’s Perspective

A baby is constantly facing an influx of sensory information that its underdeveloped brain isn’t capable of handling. So how does it make sense of all that information? She relies on her adult caretakers to help her understand what is important and what is not. An example can clarify how this learning process works. 

  • Say you are going on a walk with your toddler and you see the neighbor’s cat. 
  • You excitedly point to the cat, in the high-pitched and exaggerated voice that only parents use, and go  “Oh look, a kitty cat” 
  • The high-pitch sound stands out from all the other audio sounds the baby is hearing. At the same time, her body releases some chemicals like dopamine (to put her in alert state) and noradrenaline (to focus attention). 
  • You might then tell her how cute the cat looks and the cheery tone of your voice tells her that the cat is a “good” thing and not something to be afraid of. And simultaneously her body releases a bit of dopamine that signals relief. 

Her brain then captures all of the information related to this event — including context like the neighborhood, the name, the image and the emotional state — and stores it as a “searchable rule”. The next time she walks by the neighbor’s house, her brain pulls up this knowledge about the cat, and she gets excited to pet the cat. Suppose, at another time you happen to be on a hike and see a different cat. Now, the knowledge that your toddler has about cats doesn’t match perfectly – it’s a different location and a different type of cat. Depending on other existing bits of information (e.g. knowledge about aggressive animals in the wild), her brain might pick a different rule and suggest a more cautionary approach. 

The Story-Learning Connection

This learning process has striking similarities to how artificial intelligence (AI) is trained. Both require labeled data and multiple examples to generalize information. However, human brains have a unique ability to learn continuously by integrating discrete “units” of information into our existing knowledge base. Given what we now know about how our brains work, it seems likely that this unit of information corresponds to what lies between the cortisol and dopamine waves. The presence of this emotional signature tells the brain to take a snapshot of the moment and store it with additional metadata. This metadata, like the labels that we assign to this information (e.g. “cat”, “neighbor”, etc.), help in searching this database of knowledge at a later time. 

This also helps explain why we find stories so compelling. Stories are packaged perfectly in the form our brain needs to process a learning unit. “Once upon a time…”, “…and they lived happily ever after” which map to the rise (and fall) of cortisol and dopamine provide the ideal bookends for this learning unit.

Our affinity for the narrative form explains a lot about learning and how we make meaning. Here are three ways stories play a role for us in society:

  • Bedtime Stories: Bedtime stories, a tradition for many generations, are an ideal medium for communicating cultural values. Most folk tales don’t just tell a story but also explicitly call out a moral value, which is essentially a label for an abstract concept, at the end. When children hear different stories for the same moral they are able to build a deeper understanding of the moral concept and the different ways it can manifest. 
  • Pretend Play: When toddlers engage in pretend play they simulate novel scenarios with all the features of a story – setting, conflict, resolution. The simulation allows the child to vividly experience the emotions in the story and thereby learn from it. Engaging in pretend play with children is a great way for parents to recognize what learning their child is taking away from the situation and reframe it for them if needed.
  • Conspiracy Theories: Unfortunately, our learning mechanism can also be hacked in unhealthy ways. The narrative structure also explains why conspiracies, even though untrue and easily verifiable, are so effective. Most conspiracies start with an outrageous claim to grab attention, label the story with a moral value and suggest an action to resolve the situation. When delivered by someone you trust, which is how we started learning in the first place, the conspiracy is easily accepted and integrated into our knowledge base. 

Conclusion: The Enduring Power of Storytelling

Stories are not just a form of entertainment; they are fundamental to how we learn, make sense of the world, and connect with others. We are not certain why stories are so powerful, but one possible explanation is that the narrative structure is recognized by our brain as a unit of learning allowing it to be integrated well into existing knowledge structures. By understanding the science behind storytelling, we can harness its power for education, communication, and personal growth. So, the next time you hear “Once upon a time…,” remember that you’re not just embarking on a journey of imagination, but also engaging in a deeply ingrained learning process that has shaped humanity for millennia.

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Can AI Have Ethics?

Imagine finding yourself marooned on a deserted island with no other human beings around. You’re not struggling for survival—there’s plenty of food, water, and shelter. Your basic needs are met, and you are, in a sense, free to live out the rest of your days in comfort. Once you settle down and get comfortable, you start to think about all that you have learned since childhood about living a good, principled life. You think about moral values like “one should not steal” or “one should not lie to others” and then it suddenly dawns on you that these principles no longer make sense. What role do morals and ethics play when there is no one else around? 

This thought experiment reveals a profound truth that our moral values are simply social constructs designed to facilitate cooperation among individuals. Without the presence of others, the very fabric of ethical behavior begins to unravel. 

This scenario leads us to a critical question in the debate on artificial intelligence: can AI have ethics?

Ethics as a Solution to Cooperation Problems

Human ethics have evolved primarily to solve the problem of cooperation within groups. When people live together, they need a system to guide their interactions to prevent conflicts and promote mutual benefit. This is where ethics come into play. Psychologists like Joshua Greene and Jonathan Haidt have extensively studied how ethical principles have emerged as solutions to the problems that arise from living in a society.

In his book Moral Tribes, Joshua Green proposes that morality developed as a solution to the “Tragedy of the Commons,” a dilemma faced by all groups. Consider a tribe where people sustain themselves by gathering nuts, berries, and fish. If one person hoards more food than necessary, their family will thrive, even during harsh winters. However, food is a finite resource. The more one person takes, the less remains for others, potentially leading to the tribe’s collapse as members starve. Even if the hoarder’s family survives, the tribe members are likely to react negatively to such selfish behavior, resulting in serious consequences for the hoarder. This example illustrates the fundamental role of morality in ensuring the survival and well-being of the group.

Our innate ability to recognize and respond to certain behaviors forms the bedrock of morality. Haidt defines morality as “a set of psychological adaptations that allow otherwise selfish individuals to reap the benefits of cooperation.” This perspective helps explain why diverse cultures, despite differences in geography and customs, have evolved strikingly similar core moral values. Principles like fairness, loyalty, and respect for authority are universally recognized, underscoring the fundamental role of cooperation in shaping human morality.

The Evolution of Moral Intuitions

Neuroscience has begun to uncover the biological mechanisms underlying our moral intuitions. These mechanisms are the result of evolutionary processes that have equipped us with the ability to navigate complex social environments. For instance, research has shown that humans are wired to find violence repulsive, a trait that discourages unnecessary harm to others. This aversion to violence is not just a social construct but a deeply ingrained biological response that has helped our species survive by fostering cooperation rather than conflict.

Similarly, humans are naturally inclined to appreciate generosity and fairness. Studies have shown that witnessing acts of generosity activates the reward centers in our brains, reinforcing behaviors that promote social bonds. Fairness, too, is something we are biologically attuned to; when we perceive fairness, our brains release chemicals like oxytocin that enhance trust and cooperation. These responses have been crucial in creating societies where individuals can work together for the common good.

The Limits of AI in Understanding Morality

Now, let’s contrast this with artificial intelligence. AI, by its very nature, does not face the same cooperation problems that humans do. It does not live in a society, it does not have evolutionary pressures, and it does not have a biological basis for moral intuition. AI can be programmed to recognize patterns in data that resemble ethical behavior, but it cannot “understand” morality in the way humans do.

To ask whether AI can have ethics is to misunderstand the nature of ethics itself. Ethics, for humans, is deeply rooted in our evolutionary history, our biology, and our need to cooperate. AI, on the other hand, is a tool—an extremely powerful one—but it does not possess a moral compass. It knows about human moral values strictly from a knowledge perspective, but it’s unlikely to ever create these concepts internally by itself simply because AI has no need to cooperate with others. 

The Implications of AI in Moral Decision-Making

The fact that AI cannot possess ethics in the same way humans do has profound implications for its use in solving human problems, especially those that involve moral issues. When we deploy AI in areas like criminal justice, healthcare, or autonomous driving, we are essentially asking a tool to make decisions that could have significant ethical consequences.

This does not imply that AI should be excluded from these domains. However, we must acknowledge AI’s limitations in moral decision-making. While AI can contribute to more consistent and data-driven decisions, it lacks the nuanced understanding inherent in human morality. It can inadvertently perpetuate existing biases present in training datasets, leading to outcomes that are less than ethical. Moreover, an overreliance on AI for ethical decision-making can hinder our own moral development. Morality is not static; it evolves within individuals and societies.  Without individuals actively challenging prevailing norms and beliefs, many of the freedoms we cherish today would not have been realized.

Conclusion

Ultimately, the question of whether AI can have ethics is not just meaningless; it is the wrong question to ask. AI does not have the capacity for moral reasoning because it does not share the evolutionary, biological, and social foundations that underlie human ethics. Instead of asking if AI can be ethical, we should focus on how we can design and use AI in ways that align with human values.

As we continue to integrate AI into various aspects of society, the role of humans in guiding its development becomes more critical. We must ensure that AI is used to complement human judgment rather than replace it, especially in areas where ethical considerations are paramount. By doing so, we can harness the power of AI while maintaining the moral integrity that defines us as human beings.

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Why Schools Shouldn’t Teach AI

One of the earliest technologies that gained wide user adoption was the calculator. Pocket size  versions of the calculator became available in the 1970s and it didn’t take long before people started wondering whether children should just learn to use the calculator instead of learning mental mathematics. 

Thankfully, the educational system continued to teach basic arithmetic to young students for a very good reason. Students don’t just need to understand the concept of addition or multiplication. They need to practice arithmetic over and over again in order to build and strengthen the right neuronal connections for computational fluency. High computational fluency is correlated with better performance in more advanced math, so doing there drills in early years sets the foundation over which more complex mathematical thinking can be built. 

With the coming of AI, especially Large Language Models (LLMs), we are seeing a similar debate take place. The popular line of reasoning — AI is undoubtedly going to be a big part of our lives going forward and students need to learn how to use it — makes logical sense. 

But perhaps that’s precisely the reason why we shouldn’t teach students to use AI.

What Is The Goal Of Education?

There are different philosophical views about the goal of education, but most people would agree that education is about building the right skills so students can thrive in the real world. The point is never to teach students about all possible tasks that they might have to do, but to build enough of the right foundational skills that will allow them to adapt, learn new things and make meaningful contributions. This is why higher order skills, like creative and critical thinking, feature on the top rungs of Bloom’s taxonomy, a hierarchical model of learning goals that guides our educational philosophy. This makes sense because it is nearly impossible to predict the kinds of jobs that will exist a decade or two later. So teaching specific domains is less important than building higher order cognitive skills that will allow students to be successful, no matter what tasks they might have to face. 

Cognitive Complexity

Consider the two questions below: the first one is taken from College Board’s question for AP World History while the second task asks you to create an AI prompt. 

Task 1:

Directions: Question 1 is based on the accompanying documents. The documents have been edited for the purpose of this exercise. 

Evaluate the extent to which communist rule transformed Soviet and/or Chinese societies in the period circa 1930–1990.

(See the full question for accompanying documents)

Task 2: 

Create a prompt for ChatGPT to help you understand the significance of the American Civil War.

Which of these tasks, in your opinion, is harder?

Most people would agree that the first task is way more complex than the second one. 

To complete the first task, students have to quickly read the documents provided, make notes on the historical context, audience, perspective and purpose. As a side note, the documents are varied in nature (e.g. it could be a propaganda poster or a diary entry) and not directly related to the question. Using the provided material as evidence, students have to construct a defensible thesis. They also have to choose an outside piece of evidence that adds an additional dimension, and provide a broader historical context relevant to the prompt. In short, they have to make reasonable inferences from the provided documents and integrate prior knowledge they have about the subject to create a compelling argument. And finally they have to synthesize all of this into a multi-paragraph essay! (Big thanks to my son, who recently took the AP World History test, for helping me understand what goes into answering this type of question).

For the second task, students simply have to ask ChatGPT to explain the significance of the American Civil War! Even if they want to become more sophisticated with their prompting, the strategies (e.g. role-play or providing additional context) are pretty straightforward and easy to learn. 

It’s no wonder the AP exam gives students an entire hour to answer the first question, while the second one can be done in just a few minutes.

A more telling sign of the low cognitive complexity of using LLMs, is how quickly people from all ages and walks of life have adopted LLMs to assist them with work tasks. In contrast, not many people have attempted coding, despite the many tools and tutorials that have been available for many years. Teaching STEM skills in schools continues to be a challenge due to the lack of qualified teachers. 

Teaching students to tackle complex tasks like the first one has a higher payoff than teaching them simpler tasks. After all, if our education system helps students develop critical thinking skills and the ability to handle tough questions, then easy tasks like the second one will be a breeze for them. Much like the calculator, students don’t need to be taught how to prompt LLMs to get an answer – they need to build skills to answer it themselves. 

What Aspects Of AI Should We Teach Students?

It’s clear that teaching students to use LLMs isn’t very useful because we would almost certainly replace a more complex learning goal with a relatively trivial one. 

A more worthy goal of teaching AI would be to teach them how AI works so students can build AI models as opposed to simply using them. But this brings us back to square one, because that requires a grounding in programming and computer science fundamentals. So focusing on STEM, coding and computational thinking in the K-12 curriculum is still the right approach to prepare students for careers in technical fields. 

Beyond the technical aspects of AI, it’s probably more important for students to understand how to learn better and how AI can impact the learning process. While there are a few scenarios where AI can improve the learning process, there are also learning traps that can harm creative and critical thinking in the long run. Or, they might be better served in building their ethical reasoning skills to tackle the numerous challenges that are bound to arise as AI usage becomes more widespread in society. 

All of those would require them to think harder and deeper than simply learning how to use AI. 

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Will AI Make Us Dumber?

Back in the early 1980s, a researcher named James Flynn was studying old IQ tests when he noticed something strange. Between 1932 and 1978, IQ scores had shot up by almost 14 points! This became known as the “Flynn Effect,” and researchers kept seeing IQ scores rise by about 3 points every ten years. But then, in the early 2000s, things took a turn. Studies in a few Scandinavian countries found that IQ scores were actually dropping. And get this – a recent US study confirmed the trend, with the biggest decline in young adults aged 18-22.

This drop in critical thinking skills is like what happened to creative thinking scores over a decade ago. Professor Kyung Hee Kim discovered that student creativity, as measured by the Torrance Test of Creative Thinking (TTCT), has been tanking since the 1990s. Her analysis even led to a super popular Newsweek article called The Creativity Crisis. She found that important aspects of creativity, like coming up with original ideas and being able to brainstorm lots of ideas, have seriously declined over the years. And the decline has gotten even worse in the last ten years.

So, what’s changed that’s causing this decline in higher-order thinking skills? It’s not a huge leap to think that the rise of technology over the past couple of decades might have something to do with it. Both studies suggest that certain aspects of technology can actually hinder the development of creative and critical thinking skills.

With AI rapidly gaining adoption — over 45% of students in high school already use AI to help with their assignments — what are the possible implications on cognitive development of children. 

How We Learn

To understand how thinking is essential for learning, let’s take a closer look at what happens in our brains when we encounter new information.  Learning can be seen as a three-step process. First, our brain encodes new information and stores it in our working memory. It’s like translating a high-resolution image of an apple into a simpler icon or symbol. Next, this information might need to be moved to our long-term memory. Imagine you see a purple apple for the first time. Your brain needs to pull up your existing mental image of an apple, update it, and then store it back. This shows that working memory isn’t just storage – it’s more like a mini-computer with multiple functions. The latest model of working memory includes three specialized memory subunits and an executive controller that manages attention and communication with other parts of our brain.

One memory subunit is the visuo-spatial sketchpad, which lets you hold and modify visual concepts. For example, try picturing a red apple, then change its color to green and add some leaves to the stem. If you could do this, it all happened in your visuo-spatial sketchpad. Another subunit, the phonological loop, processes auditory information. It has a small temporary memory that needs constant refreshing.  When someone tells you their phone number and you repeat it to remember it, you’re using the phonological loop.  Working memory is where the magic of creativity and learning happens. It creates specialized models to speed up future processing. By comparing, contrasting, and finding connections, our working memory helps us understand the world better. It’s also where new ideas are born.

The challenge is that deep thinking takes time. Learning something new or creating something original means changing your internal mental models, and that requires serious brainpower.

Biological Bandwidth of Learning

The late MIT professor, Patrick Winston, was renowned for his lectures, especially his super popular annual talk, “How to Speak.” One of his top tips? Ditch the slides and use the board. Slides are good for exposing people to a topic, but the board is better for informing them. Why? Because writing on the board forces you to slow down, giving your audience more time to process what you’re saying. As Winston puts it, “The speed with which you write on the blackboard is approximately the speed at which people can absorb ideas.” 

This simple trick perfectly illustrates the concept of “biological bandwidth” when it comes to learning. Your brain needs time to absorb and store new information—kind of like how long it takes to physically write stuff down.

So, what happens when we try to cram too much information into our brains too quickly? Our working memory doesn’t have time to process everything properly. Instead of analyzing, comparing, and updating our mental models, it takes shortcuts, relying on things like stereotypes or gut feelings. This leads to quick decisions, but they’re often wrong because they’re not based on solid reasoning.

How AI Can Make Thinking Skills Worse

The problems with AI are similar to the problems of relying on too much tech, but way worse. It all boils down to “cognitive offloading,” which is when we let AI or other tech do the thinking for us. If we keep this up, our own critical and creative thinking skills will get rusty, and could even disappear for good. It’s not hard to imagine how bad that would be for society.

Students are hit even harder. During the teen years, our brains are growing and rewiring big time, especially in the prefrontal cortex. If we don’t use certain abilities, our brains just prune those connections away. So, if you’re not flexing those creative and critical thinking muscles, you might not be able to think as deeply as an adult.

Lots of schools and students are already using AI, and while it can be helpful in many scenarios, there are also some traps that are easy to fall into.

The Effort Trap

It’s obvious that using AI to write an essay without putting in any effort is bad for learning. But there are also sneakier ways that AI can trick us into thinking less. This is the effort trap: when you think you’re being critical and analyzing AI’s output, but you’re actually using less brainpower, or even thinking in a totally different way.

Here’s an example that can mess with your creativity in the long run. People often use AI to generate ideas, which they then refine. But if they had taken the time to think for themselves first, they might have come up with totally different ideas. Coming up with that initial spark is an important skill in itself, especially in ambiguous situations. By relying on AI, we’re short-circuiting our own creativity.

The Competence Trap

The competence trap is when you think you’re a pro at something, but you’re really just leaning on AI as a crutch. This can trip up both students and teachers. Teachers might think their students are killing it based on the AI-polished work they see, and move on to harder stuff before the students are actually ready.

The Capacity Trap

When information is super easy to get, it’s tempting to consume way more than our brains can handle. We’ve all been in lectures where we thought we understood everything, but then got totally lost when it was time to do the work. This is the capacity trap: it’s easy to keep chugging along without stopping to reflect, but that can lead to a big crash later on.

Making AI Work For You

AI can definitely help us be more productive and learn new things. For example, getting instant feedback from AI is very impactful because you can make changes while everything is still fresh in your mind. Waiting a week for feedback on an essay isn’t as effective because you have to switch gears and get back into that mindset. Also, teachers can use AI to personalize lessons for each student, which helps them stay engaged and understand the material better.

So, how can we use AI in a way that actually helps our thinking skills instead of hurting them?

The key is to be mindful of how much thinking you’re doing yourself and how much you’re leaving to AI. A good rule of thumb is to avoid using AI as a crutch right from the start. Instead, think about the problem first and try to come up with a solution on your own. Then, you can use AI to help you improve your work or get unstuck if you need to.