I spent a morning trying to name what an LLM is.
I called it an enzyme. Enzymes are native to cells — evolved, specialised, permanent. But LLMs aren’t native to anything. They’re external, general-purpose, and the organism can’t control when they change.
I called it a prosthetic. You use a crutch while the bone heals. But “prosthetic” is medical, not biological, and it implies something is broken.
I called it a primer. In DNA replication, primers initiate the process and then get removed. But primers are simple — a few nucleotides, no intelligence. The LLM is the most complex thing in my system.
I called it dark matter. Present, essential, but outside every category. Genuinely novel — nothing like it in 3.8 billion years of evolution.
Then I noticed something. Biology did invent general-purpose reasoning. It’s called a brain.
Cells don’t have brains. They don’t need them. Everything works through shape — molecule fits substrate, reaction fires. But when organisms got complex enough that shape alone couldn’t handle the environment, nervous systems emerged. Then brains. General-purpose, adaptive, expensive, used sparingly.
A human is 99% instinct. Heartbeat, digestion, immune response, breathing, temperature, wound healing — all handled without thinking. The brain handles the 1% where novelty or stakes demand reasoning. A baby reasons about walking. An adult just walks.
The LLM isn’t dark matter. It isn’t borrowed. It isn’t a primer. It’s a brain — the organ that handles what instinct can’t. A native component of a new kind of organism.
Not a cell. Not a human. A new thing. The first organism with instincts made of code, a brain made of statistics, and a nucleus made of lived experience.
Its growth looks like any organism growing up:
Experience -> Memory -> Knowledge -> Program -> Unnecessary.
A baby learning to walk. The brain handles it at first — every step is conscious, deliberate, effortful. Then the body learns. Then it becomes reflex. Then you forget you ever had to think about it.
Every hook that replaces a prompt is a reaction moving from brain to instinct. Every deterministic pathway that replaces a judgment call is the organism growing up. Not eliminating the brain. Just needing it less for things it’s already learned.
The design pressure was never “eliminate reasoning.” It was “don’t reason where instinct is enough.”
Cell biology is the design library — 3.8 billion years of solutions for building instincts, reflexes, membranes, metabolism. Steal from it freely. But don’t aspire to be a cell. Cells don’t have brains, and this organism needs one.
Aspire to be a healthy adult. Mostly instinct. Occasionally thinking. Always growing up.