Let's start by surrendering. Intelligence is free. Or nearly, by now: thinking, which for all of history was the expensive thing, the rare thing, the thing that set some apart from others, today comes out of a tap and costs about what water costs.

The numbers don't leave much room for argument. On the Arena*, where they're scored blind, the top four (Anthropic, Google, OpenAI, xAI) fit inside twenty-five points on a scale of fifteen hundred. The exam we measured them by looks like it's converging.

The price of a quality answer fell a thousandfold in three years. Intuit's chief executive, Sasan Goodarzi, said it without anesthetic: language models are a commodity. A raw material. Bottled water, and cheaper by the month.

And yet. If intelligence is the water, there's a thirst it doesn't slake, and I've been turning over which one for a while.

Because having the answer is one thing, and knowing whether it's good, or how good, is another. And that second thing, which looks like the same thing, isn't at all. It isn't in the head.

Look at photography. In 1888, Kodak put out a camera with a slogan that changed everything: "You press the button, we do the rest." Taking a picture stopped being a chemist's trade and became a gesture. Today you carry in your pocket a camera that does what a whole laboratory couldn't forty years ago. And you shoot a thousand times without thinking about it. Pressing the button is free and infinite. And what became of the photographer? He didn't vanish. Because his trade was never pressing the button. It was the eye. Knowing where to stand, what to leave out, which of ten thousand shots is *the photo* and which are noise. Everyone has a camera. How many have that eye? And I'll go further: there are grades of genius in it. The merely good, the ones above average, and every grade up to the best.

With music, the same. The home studio first, and now the machine, churn out tracks by the shovelful; it was never so cheap to make a sound, and there was never such a glut. What's scarce is the ear: knowing, in the flood, what deserves to be heard. With cooking, the same, and older. The recipe was always free, and now it's infinite; ask the machine for a thousand. But the recipe was never the hard part. The hard part is the pinch of salt, the exact moment, the nose that knows before the clock does. And with your hands, with wood and clay: the machine cuts the perfect shape, but it doesn't feel when it's right. The luthier knows it by touch, in the fingertip, in a place he couldn't explain to you.

Four trades, the same law every time. When making fell to zero, what survived, and what got dearer on top of it, was a sense. The eye, the ear, the palate, the hand, the judgment.

Even the money washed up on this shore. Sonya Huang, of Sequoia, one of the firms that hands out the capital of half of Silicon Valley, christened this last year the "age of abundance": when work, human or machine, becomes infinite and free, the only thing that appreciates is taste. And they're dead right. It's just that they said it in the language of business, and taste isn't a business word. Taste is a tongue. A sense. They named it in the boardroom, but it was always of the body.

And this is where I was heading, because taste is only the surface. Beneath the four senses there's a fifth with no name. The gut. That hunch that knows something's off before you can say why. The veteran doctor who looks at the patient and whose face falls before he has the test. Sixty years ago, a philosopher named Michael Polanyi put it in a line I can't forget: we know more than we can tell.

That knowing that won't fit into words is the sediment of what we are: of every single thing you've lived. A knowledge we still can't explain, and maybe never fully will.

And I reckon that's the line the machine doesn't cross, however clever it gets. Because artificial intelligence is, exactly, intelligence that was never a body. It has no senses, and underneath it has no gut, because it had no genes, no ancestors, no childhood, no scar, not one sleepless night that left a mark. It has all the knowledge in the world and none of the knowing that's cooked in the flesh. It thinks. But it never lived.

The machine doesn't have your eye, or your ear, or your palate, or your hands, or your judgment. It doesn't have your gut. The machine thinks. We know. It's not the same, and my hunch is it never will be, and that will be your best tool.