The English poet John Milton did well when he said that “Truth will rise to the top through a free and open exchange in the marketplace of ideas.”  I am so encouraged when I have and see a substantive dialogue with someone concerning an issue.  This is certainly important in every day discussions, blogs, and teaching.  I assist in managing and teaching an Intro. to Philosophy course at university and I always encourage my students to make us work hard to convince them of what we believe to be true.  Do not simply sit there and take what I say and teach prima facie–challenge me, challenge the thoughts, challenge your thinking.