Many people think that a heart shot will stop a being. About the only way to get this type of action would be a shot to the central nervous system. This would be to the base of the spinal cord and brain, not necessarily the brain as witnessed by the congresswoman who servived a head shot.
After listening to Halfbaked, he sounds like he will not see the light and continue to believe what he believes. This is all after he is told of all these different examples to the contrary. Of course this doesn't make him a bad guy, just a little confused to the facts.

But I think we can still let him hang with us!