In fact, issues such as necessary and sufficient conditions often appear in debates. This kind of question is usually asked to prove that the other party is not comprehensive enough.

Sufficient and necessary condition

If success is a sufficient condition for a hero, it is that as long as a person succeeds, he is a hero. The necessary condition is that as long as he is a hero, he must be successful.

The existence of special circumstances

The subtext of the Wuhan issue is that Cinda is caught in an absolute debate and ignores the existence of special circumstances.

The difficulty of proving and overthrowing

In an argument, it is much more difficult to prove one thing than to overturn it. Because proof needs to prove that everything is true, and to overthrow him, just give a counterexample.

Leave some space.

Therefore, the argumentation process must be rigorous, and the conclusion must leave room for special circumstances.

Learning material recommendation

As a novice, I recommend you to watch 1999 International Debate Competition for College Students, which is very classic and will benefit you a lot. For example, it is easier said than done, which is more important, developing knowledge economy, natural science or social science.