Word for "argument against my current position"?

Sorry about the badly phrased title. I'm not quite sure what I'm looking for, either.

My situation is that I'm writing a report arguing for the usage of A over B. I have listed many advantages of A, and disadvantages of B.

However, I also want to point out that B still has its own merits, and cases where it is better than A. Is there a word I can use to refer to the section that I argue in favor of B in?

The word would kind of mean arguing against my own current position, or arguing against oneself with intent of providing an alternate perspective.

Thanks!

The most simplistic single word is counterargument:

[Merriam-Webster]
: an opposing argument

// Joseph Stiglitz's new book, "The Price of Inequality," is the single most comprehensive counterargument to both Democratic neoliberalism and Republican laissez-faire theories.
— Thomas B. Edsall
// On cost, the counterargument is that widespread job losses lead to deep recessions and thus sharp declines in government revenues.
— The Economist, "Bartleby Waging war on recessions," 20 June 2020