We assert that A-lab has not successfully synthesized the vast majority of the claimed new compounds. Since we raised issues in the paper shortly after publication, the Ceder group has conceded that A-lab does not live up to human standards, but still claim that "the system offers a rapid way to prove that a substance can be made -before human chemists take over to improve the synthesis and study the material in more detail." We hope that our comment made it clear that this statement is not justified -the A-lab paper does not provide proof that the new materials can be made. The data can in at least 40 out of 43 cases be interpreted with the opposite conclusion, which is that in these cases, the predicted materials have not been successfully synthesized. Major improvements to the data analysis and the addition of careful compositional characterization are necessary to draw the alleged conclusions.