Question: During 2007, what was the percent of defective mortgages not underwritten to Citi's standards?
Sentence: His testimony stated that by 2006, 60% of mortgages purchased by Citi from some 1,600 mortgage companies were "defective" (were not underwritten to policy, or did not contain all policy-required documents) – this, despite the fact that each of these 1,600 originators was contractually responsible (certified via representations and warrantees) that its mortgage originations met Citi's standards.
Answer in sentence: no