I read it. He has a section titled "The asymmetry between positive and negative evidence".
His argument is that a positive result is like seeing a black swan, and a null result is like seeing a white swan, and once you see a black swan, then no matter how many white swans you see it doesn't prove that all swans are white.
He addresses the objection that this leaves us unable to ever reject a spurious claim. His answer is that, since negative evidence is always meaningless, we should get positive evidence that the experimenter was wrong.
I think this is a fair summary of the section. It's not long, so you can check for yourself. I am... not impressed.
His argument is that a positive result is like seeing a black swan
Actually, it's like hearing a report of a black swan, which is why the burden of proof is generally put on the report.
It's even worse than that for him. What a bad analogy for him to rest his case on. Surely, the purpose of these social science studies is not to make a claim about the existence of some bizarre subset of the population (a black swan), but that the results will generalize to the population at large (all swans are black).
It's not long, so you can check for yourself.
That's more than enough for me.
Thanks for taking the bullet for us.
Jason Mitchell is [edit: has been] the John L. Loeb Associate Professor of the Social Sciences at Harvard. He has won the National Academy of Science's Troland Award as well as the Association for Psychological Science's Janet Taylor Spence Award for Transformative Early Career Contribution.
Here, he argues against the principle of replicability of experiments in science. Apparently, it's disrespectful, and presumptively wrong.
This is why we can't have social science. Not because the subject is not amenable to the scientific method -- it obviously is. People are conducting controlled experiments and other people are attempting to replicate the results. So far, so good. Rather, the problem is that at least one celebrated authority in the field hates that, and would prefer much, much more deference to authority.