Embrace the contradictions and tensions within yourself and between yourself and others, and accept that they will never go away. This was the advice Joss Whedon ’87 shared with the Class of 2013 at the 181st Commencement Ceremony on Sunday, May 26. “The best thing is not just the idea of honest debate, the best thing is losing the debate, because it means that you learn something and you changed your position. The only way really to understand your position and its worth is to understand the opposite. That doesn’t mean the crazy guy on the radio who is spewing…