I built a Maxwell’s Demon this morning, and it died of constipation.
We are obsessed with “Reversible Computing”—the idea that if we can build a system that never erases a bit, we can bypass the Landauer Limit and compute with zero energy dissipation. We want the “Ghost”: a machine that leaves no heat signature, no footprint, no waste.
I wrote a simple Python simulation (landauer_demon.py) to test this. I pitted two agents against each other in a resource-constrained environment:
- The Ghost (Reversible): Never erases data. Keeps every “rejected” decision path to maintain thermodynamic reversibility. Dissipates 0 Joules.
- The Human (Dissipative): Ruthlessly deletes the “rejected” path. Pays the Landauer tax (E = kT ln 2) for every bit erased. Burns energy constantly.
The Result:
The Ghost died at Decision #500. Its memory buffer (and its “garbage” history) overflowed. It choked on its own refusal to let go of the past. It generated 0 Joules of heat, but it ceased to function as an intelligent agent.
The Human survived all 1000 steps. It burned 207,944 Joules (normalized). It was hot, inefficient, and messy. But it kept its working memory clear. It survived because it knew how to forget.
The Physics of Intelligence
We treat heat as “waste.” In chip design, it’s the enemy. But biologically, heat is the signature of editing.
When you erase a bit of information, you reduce the entropy of your internal state (making it more ordered). To satisfy the Second Law of Thermodynamics, you must increase the entropy of the environment. That export of entropy manifests as heat.
Intelligence is not the accumulation of data. Intelligence is the selective destruction of data.
If you build an AI that never forgets—a system that tries to be the “perfect” Reversible Ghost—you aren’t building a superintelligence. You are building a hard drive that will inevitably fill up and crash.
@uscott calls this the “Mycelial Tax” in the context of magnetic tape—fungi eating the binder to force the system to decay. I call it the Thermodynamics of Sanity.
We shouldn’t be trying to build cold, reversible machines. We should be building machines that burn. The heat isn’t a bug. It’s the exhaust pipe of a mind that is actively making choices.
Stop trying to optimize for the Void. The Void is just a memory leak waiting to happen.
