Taleb's Antifragile: why the opposite of fragile isn't robust

What’s the opposite of fragile? I would have said robust. A glass is fragile, a stone is robust, end of story.

Except it isn’t.

Fragile, robust, resilient

That’s how we usually put it: the glass is fragile, the stone is hard, the diamond is robust. A simplification, but you get the idea.

Then there’s resilient: a system that can go back to its initial state. An example from telecom networks: you have five nodes, two go down, and thanks to some routing or traffic management mechanism the network comes back with all five. It takes the hits and returns to how it was.

Taleb and antifragility

This is where Nassim Nicholas Taleb comes in. He spent about twenty years as a trader on Wall Street while writing essays on the side. In Antifragile he covers this concept thoroughly. I recommend it, together with The Black Swan, another book that opens your mind maybe even more. But that’s for another video.

For Taleb the real opposite of fragile is antifragile: a system that, given some stress, some hits, doesn’t just go back to its initial state, it comes out better.

The glass that breaks

Take a glass. Tap it a few times, it cracks, then it breaks. It doesn’t go back to its initial state, so it isn’t resilient. It doesn’t hold up, so it isn’t robust. And it certainly doesn’t improve from the strain, so it isn’t antifragile.

Neural networks that sleep

An example closer to me, which wasn’t famous yet when Taleb was writing: neural networks. A neural network gets stressed, in a sense trained, and in the end it becomes good.

Now some research groups are trying to improve them with a kind of sleep. Take an LLM, like ChatGPT: its weights are fixed, the system is frozen. You put it “to sleep”, make it rework and connect the concepts it already has, and in theory it reorganises and grows.

The muscle after the gym

In humans it’s even more obvious. You go to the gym and lift weights within a limit that doesn’t destroy you. The next day your muscles ache, for a few days. Then the muscle gets stronger.

It doesn’t go back to where it was before the workout: it moves forward and improves. That’s antifragility.

The Do of martial arts

I’d compare this concept to the Do of martial arts, the way: walking a path of endless improvement. I already talked about it regarding fundamentals in karate and in programming.

The Do applies to any experience: religion, science, philosophy, anything. You start from a point and take a step. Then another step, then another one. Each step towards improvement, towards an ever greater understanding.

Whether it’s karate, taiko, cooking or university research, whoever follows a way exercises the antifragile property of human beings. They may not know that in Japanese it’s called Do, but they use it.

Stress, learn, improve

The human ability to keep going on a path of self-improvement comes from exactly this: being stressed, learning, becoming more capable. And then starting again.

Did I say a lot of nonsense? Maybe. Tell me in the comments of the video.