What paragraph does the counterargument go in?

The most common places for a counterargument are in the introduction, the paragraph after your introduction, or the paragraph after all of your main points. Placing your counterargument in your introduction is one effective way to include your counterargument.

What is a word to describe someone who thinks they are always right?

opinionated – someone who is opinionated has very strong opinions that they refuse to change even when they are clearly unreasonable. Someone who thinks they are always right but are, in fact, not right is often described as being cocksure.

How do you describe someone who thinks they are always right?

There are many words to describe someone who always needs to be right, including indomitable, adamant, unrelenting, insistent, intransigent, obdurate, unshakeable, dictatorial.