More evidence the guy is a pathological liar.
That's going a little too far. If it is discovered he is not a brain surgeon, then he might be a pathological liar.
Ben Carson is a story teller. Truth should never inhibit a better story. Story tellers want to keep their audience interested and this means the interesting parts are polished and enhanced. For the majority of story tellers, it never matters. If you happen to be running for President, and you're not a career politician, it's can be a problem.
A career politician expects everything he says in public to be examined by a critical audience. Ben Carson has never had to face a critical audience. Up until some idiot told him he should run for President, his contact wit the press has been feel good pieces about how wonderful it is to cut open a person's skull and save their life. Add a rags to riches bio and everything is easy.
There's really nothing wrong with being a story teller, but if Ben Carson wants to be President, he needs to have some better stories.