In reference to your question.
Absolute Truth - Inflexible Reality
"Absolute truth" is defined as inflexible reality: fixed, invariable, unalterable facts. For example, it is a fixed, invariable, unalterable fact that there are absolutely no square circles and there are absolutely no round squares.
Absolute Truth vs. Relativism
While absolute truth is a logical necessity, there are some religious orientations (atheistic humanists, for example) who argue against the existence of absolute truth. Humanism's exclusion of God necessitates moral relativism. Humanist John Dewey (1859-1952), co-author and signer of the Humanist Manifesto 1 (1933), declared, "There is no God and there is no soul. Hence, there are no needs for the props of traditional religion. With dogma and creed excluded, then immutable truth is also dead and buried. There is no room for fixed, natural law or moral absolutes." Humanists believe one should do, as one feels is right.
Absolute Truth - A Logical Necessity
You can't logically argue against the existence of absolute truth. To argue against something is to establish that a truth exists. You cannot argue against absolute truth unless an absolute truth is the basis of your argument. Consider a few of the classic arguments and declarations made by those who seek to argue against the existence of absolute truth…
"There are no absolutes." First of all, the relativist is declaring there are absolutely no absolutes. That is an absolute statement. The statement is logically contradictory. If the statement is true, there is, in fact, an absolute - there are absolutely no absolutes.
"Truth is relative." Again, this is an absolute statement implying truth is absolutely relative. Besides positing an absolute, suppose the statement was true and "truth is relative." Everything including that statement would be relative. If a statement is relative, it is not always true. If "truth is relative" is not always true, sometimes truth is not relative. This means there are absolutes, which means the above statement is false. When you follow the logic, relativist arguments will always contradict themselves.
Once you start going here it goes way off topic from what he is actually talkig of so that is why i am confused about how you feel this is on the same topic as he is discussing in this thread. Just some thoughts