Here are documented cases where people can survive with NO brain due to a variety of instances.
http://www.unexplainedstuff.com/Mysteri ... Brain.html
http://www.newscientist.com/article/dn1 ... ctors.html
Too many documented instances for scientists to shrug off.
We can only reason from what is; we can reason on actualities, but not on possibilities. Thomas Paine