Dissent, then, is a powerful source for developing effective public reasoning, itself necessary for determining the legitimacy of the actions and institutions of a given state as well as the customs and practices of a given society. Dissent is defined as a disagreement in opinion. An example of dissent is the decision to vote differently from one's friends in the student council election.
to show the other part or other side like pros and cons there can be the pro of the argument and the cons the cons can show why/when/where the bad parts of the topic/theme is