This still is shaky to me.
1. Dude just said he thought Coughlin would be a good fit. That doesn't mean the Bengals were only interested in Coughlin, or that he was even their favorite going in.
2. Bengals had a black assistant coach on staff they also interviewed. Since they had that planned, the Rooney Rule was met. So the Lewis interview was something they chose to do - not had to do.
Seems like they could have just had a legit interest in Lewis.