alt Hacker NewsIt's not just checking user thumbs up/down. As your quote says, they also did a controlled study with people rating the results. What else would you want them to do? The whole point is that it needs to introduce a detectable statistical difference, but humans should not be able to perceive it as a quality difference.
> What else would you want them to do?
Retest on benchmarks whether it accomplishes tasks with the same success rates. Prose is only one thing.
Messing with the randomness may make the problem solving capabilities weaker. Probably it doesn't but this is the answer to what else I would want them to do.