The Extended Mind in the Age of AI: Extension or Replacement?

Feel the peace with my Monstera Lemon Lime

We often assume that thinking is a solitary act that happens entirely inside the brain. Furrowed brows, rigid posture, as if as long as our neurons work hard enough, answers will simply appear out of nowhere.

But reading The Extended Mind: The Power of Thinking Outside the Brain by Annie Murphy Paul hit me like a wake-up call. It argues that real, deep thinking often happens outside the skull: it draws on the body, the environment, and other people. At its core, the book offers three highly practical ways to “extend” our thinking. As I read, I realized that many moments when I broke out of mental dead ends in the past lined up perfectly with these ideas.

The Body: The Most Honest Guide to Thought

The first extension is thinking through the body.

I’ve had this experience countless times: faced with a difficult problem, my mind starts racing, trying to logically untangle the source of my anxiety. But the harder I analyze, the stiffer my body becomes. My breathing shortens. My thoughts feel like they’re sinking into quicksand. The more I struggle, the deeper I go. It’s a classic loop: tension triggers thinking, and thinking intensifies the tension.

The book reminded me of something easy to overlook: the body often senses that something is off before the mind does. That persistent tightness, the stiffness in the shoulders and neck, the knot in the stomach, these are encrypted signals from the body.

I used to try to decode them with my mind: Why am I anxious? What can I do to fix it? Now I’ve learned a different approach. I stop analyzing and shift my attention directly to the body. No judgment, no explanation, just noticing the tension and be at the moment. Strangely, when thinking shifts from “problem-solving mode” to “body-awareness mode,” it’s as if the power to that feedback loop gets cut.

When rational thinking fails, the body becomes the last anchor. Instead of endlessly trying to fix things in the mind, it’s often better to return attention to the living body that carries all our thoughts.

The Environment: A Refuge for a Cluttered Mind

The second extension is thinking through the environment.

This is a method I especially love. Whenever my mind feels like an overheated CPU, fans spinning but nothing getting processed, staring at a screen or book only makes things worse. At that point, I need to hand off the burden of thinking to something larger: nature, or even just a single plant.

Walking into nature, watching light filter through leaves, seeing shadows shift with the wind—this quiet, unforced order slowly settles into my body. It doesn’t offer solutions. It simply reminds me that there is a kind of calm in the world that exists beyond whatever I’m stuck on.

Taking care of my 200+ collections of alocasias, begonias, anthuriums, and monsteras at home works the same way. Watering, fertilizing, wiping, pruning, repotting, gazing—these small, concrete actions give my drifting thoughts something to hold onto. When my hands are busy with something alive and tangible, the tension in the background softens. And often, that’s when ideas show up, unannounced.

The environment isn’t just a backdrop. It’s both a cooling system for the mind and an external place to offload thought.

People: Breaking Out of Solo Thinking

The third extension is thinking with other people.

It sounds obvious, but when we’re anxious, we tend to withdraw and cut ourselves off. The blind spots in our thinking are like a flashlight beam. No matter how far it reaches, there’s always darkness right at our feet.

But when I push myself to talk to others, something shifts. A colleague might offer a blunt but practical process. A friend might reframe the issue emotionally. Even a casual comment from someone unrelated can act like a mirror, revealing what I couldn’t see on my own.

This idea also connects deeply to how teams are working with AI today. You can already see a split: some people are becoming dramatically more effective with AI, while others feel stuck, or even more anxious by comparison.

So how do we prevent “faster individuals” from turning into a fragmented team? The book echoes something I’ve been thinking about: those moving faster shouldn’t just keep accelerating. They need to make their thinking process visible, especially how they use tools, so others can learn from it. That process becomes scaffolding for the team.

What we need is a culture of shared leverage, where people at different speeds support each other. Raising the floor of the team matters more than raising the ceiling.

In the Age of AI, Are We Extending or Shrinking?

When I finished the book, what stayed with me wasn’t just the three methods, it was a more unsettling question.

We’re living in an era filled with powerful AI tools. In theory, AI should be the ultimate extension of thought. But in practice, I see many people, including myself at times, using AI to replace thinking rather than extend it.

As I wrote in my previous piece The Cost of Letting AI Read for Us, when we rely on AI to read, summarize, and extract ideas for us, we skip the very processes the book emphasizes:

• The body no longer feels confusion or excitement when grappling with difficult passages.
• The environment no longer frames the experience, no more quiet afternoons shaped by light and space.
• We no longer engage in the friction of interpreting and debating ideas with others.

Use it or lose it. If we hand over the act of thinking to algorithms, what we lose isn’t just knowledge, it’s our ability to perceive, to connect, and to feel.

I’m grateful for this book. It felt like a wake-up call, pulling me out of both the exhaustion of overthinking and the laziness of over-relying on AI. To go beyond thinking is not to become more like a machine. It’s the opposite. It’s about becoming fully human again: sensing through the body, grounding in the environment, and thinking alongside others.