The details make all the difference.

I’ve spent my life at the intersection of mathematics, philosophy, and technology — and I grew up in a place where all three converged every night: a living room in Las Vegas where my father, a Cuban immigrant casino executive, taught me to think at a card table.

This newsletter is about the details everyone glosses over — and why those details make all the difference. Understanding the structure underneath the surface is what protects you from the algorithms that distort your perception of reality. It’s what helps you make the Tuesday morning decision — the one with imperfect information, real stakes, and no one to tell you if your instincts are right. And it’s what took human beings to the moon. The discipline is the same whether you’re defending against a system designed to exploit your thinking, navigating the everyday complexity of running a business or raising a family, or reaching for something so ambitious it scares you. The details always matter. The spectrum is one continuous landscape. And the practice of seeing clearly works everywhere on it.

Holding the Edge is a biweekly newsletter about navigating that spectrum — using math, philosophy, and AI to help you see what your instincts can’t. It’s also the foundation for a book I’m writing by the same name.

If you believe that understanding how things really work is the beginning of making them work for you — this is for you.