Various people approach the subject of appeals differently.
A deep understanding comes after serious study. The purpose of this web page and the English 105 class is not to make students experts in rhetorical appeals. The purpose is to introduce students to the terminology and a first level understanding of how these appeals operate in discourse. Important to any understanding is that all of the appeals are generally used in any one piece of discourse. So, to keep things simple, we break out a fourth appeal, the social appeal.