Dead Men Walking?

There was once a man who believed he was dead. He constantly told his wife that he didn't believe that he was alive so partly to help him and partly to preserve her own sanity, his wife and kids sought out professional help. However, all the doctors and psychiatrists in the world could not convince him otherwise.
Finally, one doctor settled on a plan to establish empirically the fact that only living people bleed. The man was trying to deny that as well but they showed him slides, videos, books, journals, cadavers, and even interviewed specialist in the field who constantly affirmed the fact that living people do indeed bleed. Living people bleed!
Finally, the man conceded, “Alright, I guess I am going to have to admit that only living people bleed” As soon as he said that one of the doctors there immediately took a pin and plunged it into one of the veins on the mans arm which instantly gushed forth blood. At which the man looked at if and exclaimed “Great Scott! I guess dead people bleed too!”

Do you realize that for all practical purposes, that man was really dead? Because from all vantage points, no amount of information could change his thinking. What do you think? What implications does this have on the way we talk to unbelievers? To Christians struggling with false beliefs? Have you ever been caught in this kind of mind game?