When youre doing a paragraph outline, how do you know where one section, or main point, ends and another begins?
The first thing to look for is a shift in topic. While the overall topic stays the same, smaller sub-topics come and go. A complex essay will typically deal with many separate sub-topics that together add up to the big picture the author wants to paint. When they shift to a new sub-topic, that is a sign that they are also making a new point, one of many that adds up their overall point (the thesis).
There are some really clear examples in the Obama speech:
But there are clear examples in the McKinney speech as well:
Usually when an author or speaker starts on a new sub-topic, a new main point, they will use transitional words and phrases to signal the change. Here are some examples from the two speeches. None of these is a 100% guarantee that a new topic is coming, but it is one piece of evidence.
Obama
McKinney
Many authors, Obama included, sometimes use short paragraphs to mark a transition to a new topic. For example, paragraph 6 (This belief ...) is a very short paragraph that marks the transition to his personal story.
While transitional words and phrases, and changes in paragraph length, can help you spot transitions, in the final analysis its the sub-topics that mark off the main ideas. Figuring these out takes work, and its not an exact science. Theres a certain amount of subjective judgment (personal opinion) in determining exactly where the sections break. But overall, any two competent readers will agree on the major elements of the argument, and put the breaks in roughly the same spots. Most significant disagreements turn out to be a question of sub-points, where one person wants to break a major section up into smaller sections and the other does not. In other words, disagreements are usually more a question of how detailed you get in your analysis, rather than disagreements over the major parts of the essay.