preface

What could lead one to believe that the universe is a cosmic computer?

Being a coder — especially one who has written lots of code in several coding languages over a few decades — might predilect one to that way of thinking. But also it could be reflection on the observation that codes are everywhere, and everything seems to be made of them.

There is DNA's code of life, and Dr. Phil's Life Code.

I've used LaTeX/Mathematics (a language for coding the display of mathematics on paper or on a computer) for writing math. Outside of the math in one's brain code (see Jan Mycielski's "The Meaning of Pure Mathematics" on intentionalism as compared to formalism and platonism) and math written down or stored in a computer (like coded in LaTeX/Math[ematics]), that's all the places math can be. So math is made of code.

Math written in LaTeX/Math is not directly "executable" on a computer, but Mathematica comes close to being able to do that. Mathematicians may not write completely pedagogical expressions with LaTeX/Math since it is a display language, not a programming language. But when math is expressed in a programming language, it has to be exact. Whether written to display or written to execute, math is made of code.

As physics is expressed in math, physics is made of code, too.

So life is made of code, math is made of code, and everything in between is made of code.

The universe is made of code.