How on earth did not disclosing the system being installed tie in with any assumption of recognition????
"While Boeing considered the possibility of uncommanded MCAS operation as part of its functional hazard assessment, it did not evaluate all the potential alerts and indications that could accompany a failure that also resulted in uncommanded MCAS operation,"
It's a problem with how FHAs are done. And that's following the process for them. Go read ARP4754 and 4761.