“Opposing Viewpoints”

Using the ECPI Online Library database “Opposing Viewpoints” or the online site “ProCon.org” – find a topic/issue of interest to you, read both sides of the argument and then summarize the elements of ethos, logos, and pathos presented. Do you have to have all three elements (ethos, logos and pathos) in order for an argument to be persuasive? Why or why not? Does a speaker need to change an audience's members mind completely in order to be successful at persuasion? Why or why not?