They knew. They will tell you they didn’t know. They’ll pretend that this was as much of a shock to them as it was to you and to me. But they knew. By “they,” I mean anyone involved in the media-political complex that propped up a man in visible, irreversible organic decline for four years because he was their best option to have a Democratic president. They all knew, at some level, he was incapable of carrying out the job he had campaigned for and was elected to do. And, until Joe Biden demonstrated on a debate stage on Thursday just how incapable he was for the position he holds, they conten…