Diane Abbott isn't thick. She obtained a place at Cambridge in the 70s as a working class black woman. She studied History which I would say provides a useful skill set for being a politician and will have been put through the wringer on interview so is definitely capable of thinking on her feet and responding to argument. But she fudged some numbers once so she's thick. Michael Gove once stood up and said that his aim was for ALL schools to achieve an above average standard. When questioned he didn't see the obvious problem. He's not labelled as thick though, why is that? It's forgiven as a momentary lapse for a well spoken white man, but for an overweight black woman with a crap haircut it's taken as proof she doesn't belong.