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" At the same time, I do wonder how useful it is to eliminate the concept of truth. To what degree, I wonder, does human nature depend on truth and how do we respond to that need? Can humans feel trust without certainty?"

 Grobstein brought up, several times, if learning more about the brain changes the way that we look at ourselves as human.  While many would argue that we seem "less human" by eliminating the 'mysterious' and even 'soulful' aspect of humanness, I honestly believe that it is not learning more that makes people draw this conclusion.  I believe that people consider science to be a conclusive thing -- that once a discovery in science is made, absolute truth is placed upon that knowledge.  Therefore, with so many discoveries being made about brain and behavior, I think that -- in order to eliminate the thoughts about considering ourselves less human with this newfound information -- people should instead consider that, while we have one aspect of the truth delivered by one type of science, there lie many more conclusions to be made.