Did AI Really Discover New Physics? ↗
The headline says AI discovered new physics in the fourth state of matter. The work underneath says two physicists and their graduate students spent more than a year building a neural network, then noticed the textbook was slightly wrong.
Those are not the same sentence.
Ilya Nemenman, an Emory physicist, quoted in ScienceDaily:
What’s even more interesting is that we show that some common theoretical assumptions about these forces are not quite accurate.
That sentence is the actual discovery, and a person said it. The team tracked charged particles in dusty plasma, trained a custom model on the trajectories, and fit the non-reciprocal forces between grains to better than 99 percent. The fit is the machine’s. Looking at where the standard assumptions broke, and understanding what that meant, was the human’s.
The tell is the timeline. By Nemenman’s own account it took “more than a year of back-and-forth discussions” to design the network. That is not a machine making a discovery while the scientists watched. That is scientists doing science, with a very good curve-fitter in the loop. A telescope does not discover a planet. The astronomer pointing it does.
I am not knocking the result. Finding that a long-held force assumption is wrong, in the state of matter that makes up most of the visible universe, is real work that deserves the PNAS slot it got. The complaint is the verb. “AI discovered” is doing labor the experiment did not.
The verb matters because it sets the bar for every headline that copies it. If “AI discovered” means a tool helped researchers refine a model they spent a year specifying, then fine, that describes a large fraction of science now, and we should say so plainly. But the headline is selling autonomy the work never had. It hands the credit to the instrument and quietly files the people who built it under acknowledgments.
Used properly, the press office line goes, AI can open doors to whole new realms. Used in a headline, it can close the one marked “who actually did this.”