Often in general debate, not just in logic, conditional statements are used. As the rules of Modus Ponens and Modus Tollens both can be used to provide valid arguments based on the supposition of a conditional, they are both incredibly useful within any form of argumentation or debate. In this lesson, we went over both of these rules in detail so that in the future, when conditional statements are used around you, you will have the tools to determine which conclusions can be drawn based on the statements. Furthermore, these rules of inference can be used with only categorical propositions. This allows for a concrete application of Universal Affirmative and Negative propositions from earlier lessons.