I: There are no absolutes! All truth is relative!
A: Are you absolutely sure? You can't, meaning you are affirming something in the process of denying it.
If all truth is relative, does your statement includes itself or excludes itself? If it includes itself, then what you are saying is relative too which mean it isn't always the truth. And if your statement excludes itself, that means you are posting an absolute statement while denying that absolutes actually exist.
As you can see, to say that there are no absolutes and/or all truth is relative, is a self-contradictory statement.
eerlo en Español