WB failed to properly certify that they made a best effort at truth: their machines fundamentally are more error prone than they could be, and thus WB didn't spend a reasonable effort on ensuring veracity of their claims.
More specifically, the lawyers whose name is attached claimed that under his best powers, the claims are known to be true. However, he knows the error rate of WB bots is above that human workers would produce parsing the same content. They fail to do an additional check on the machine parsed lists (or they'd remove many of these embarrassing links).
But they did sign, under penalty of perjury, that they did.
More specifically, the lawyers whose name is attached claimed that under his best powers, the claims are known to be true. However, he knows the error rate of WB bots is above that human workers would produce parsing the same content. They fail to do an additional check on the machine parsed lists (or they'd remove many of these embarrassing links).
But they did sign, under penalty of perjury, that they did.