Isn't it Rosenstein's job to know whether the FISA application is legitimate before he signs it? Why is the CTH making an excuse for Rosenstein?
I can't tell you why, but the whole article is clearly designed to give not only Rosenstein but Mueller cover for their criminal actions. Corey had already testified in open to Congress the dossier was unverified, so to claim Rosenstein was unaware is ridiculous.