The Limits of Reason to Persuade

I think Lisa is right.  Reason and reasoned argument are essential foundations for seeking the truth and attempting to share with others the truth we have found, but they are not always sufficient in the task of persuading others to that truth no matter how reasonable.  We are not Vulcans.  My experience suggests to me that often times human beings (myself included) will hold on to a set of very dearly held beliefs (or desires) long after the unreasonableness of those beliefs has been exposed.