Brandt Welker

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The Second Law Is Undefeated

Every lever has an inverse, and nobody has beaten the second law. AI is a massive lever, so the bill is out there somewhere. The people who worry me are the ones convinced there isn't one.

·2 min read

Thermodynamics is the one law I’ve never seen anything beat. Not a market, not a technology, not some clever financial structure, and not a founder who swears this time is different. Every system has a ledger somewhere, and the ledger balances. You can move where the cost lands, but you can’t make it go away. I don’t mean that as a point about physics. It’s just the closest thing I know of to a rule that holds everywhere.

The version that’s useful day to day is smaller: every lever has an inverse. You pull hard on one end and something moves on the other, and if you can’t see what moved, that doesn’t mean nothing did. It means you haven’t found it yet. A shortcut that saves you time spends it somewhere downstream. A process that removes friction in one place adds it somewhere else, usually where you aren’t looking, and usually later.

AI is a massive lever, maybe the biggest one I’ll see in my working life. That’s exactly why I don’t buy the free-energy story people are selling about it. When someone tells me a technology is all upside and no cost, they haven’t found the cost yet. Maybe it’s a skill that quietly stops getting practiced because the machine does it now. Maybe it’s a dependency you don’t notice until the thing goes down. Maybe it’s judgment that weakens when nobody has to do the reps anymore. I don’t know where the bill lands. I just know there is one.

None of this is doom. I’d pull the lever. Levers are how anything big gets done, and refusing to pull one because it has a cost is its own kind of foolishness. What I want is for people to go looking for the inverse on purpose, early, while it’s still cheap to see.

The people who worry me are the ones who’ve convinced themselves there’s no cost at all. Free energy is one of the oldest scams there is, and it comes back every generation looking newer and shinier. This generation’s version is very impressive. I still haven’t seen one that worked.