I notice this whenever I spread out my sleeping bag, so I know the condition is widespread. The nights in the mountains have become much colder than any I knew in the past. The air has started getting thinner. The trails have doubled in length. McMannis cites these difficulties not as examples of his getting older, but as examples of his theory that there have been enormous geophysical changes in the Western Hemisphere and the earth has shifted on its axis, causing the trails to stretch.
Examples are a form of inductive reasoning, supporting a conclusion.
Go over your speech and look for generalizations that could use the help of specific examples to be more vivid. The repetition or restatement of an idea at intervals not only promotes clarity, but encourages the acceptance of an idea. When you repeat and emphasize one idea, competing ideas are subordinated and sometimes are driven completely out of the audience's mind. In both these cases, the speeches had rising momentum, punctuated by the repeated refrains. I told the audience that if they give off positive energies and are enthusiastic, they would attract positive, enthusiastic friends.