The simplest transitions are coordinating conjunctions, also known as the "FAN BOYS" words: for, and, nor, but, or, yet, so. These common words help us connect not only our words but our ideas. For example, when you use the word "so," you are saying, "here's something that we can conclude from what I just said." When you use "or," you are saying, "here's another possibility." The most commonly used coordinating conjunction, "and," is also the weakest in terms of the meaning it conveys, indicating only that "here's something else." Coordinating conjunction do act as transitions, but they are not enough to give an essay a strong sense of cohesion.