While preparing for a public speaking engagement, have you ever had writer’s block? Can’t figure out the logic that’s most likely to move your audience? Or maybe it’s the opposite: there are so many possible arguments that it’s difficult to choose among them? According to the Greeks there are seven basic sources of argumentation. In order of persuasiveness, they are security, health, utility, the five senses, community, emotion, and authority. Learn more about each in this week’s Persuasive Communication Tip of the Week.