I think that is an oversimplification of what I am saying.
This isn't any different than asking if a tree makes a sound in a forest when it falls down and nobody is around to hear it. It is correct to assume that it does, but it's simply an assumption based on what you know and your own experience. And a sound is simply a sensory experience, which has absolutely no meaning if it isn't experienced by somebody with the capacity to understand it. That is all that absolute truth is. An assumption based on human experience. It exists, but only as defined by human assumptions.
For example, if you were an alien who came to this planet who had absolutely no ability to hear, then sound would be a meaningless concept. You might know about vibrations in the air, but without the ability to percieve it, sound would have no meaning. So sound, as we know it, would be non existent to an alien who has no ability to hear even as it watches a tree fall in a forest. The same goes for absolute truth. An alien with a different way of thinking may have no conception of "truth" as we know it. Therefore, it would be meaningless to them.
Truth is dependent upon human perception, because it defines the parameters of what truth is.
In order to justify an absolute truth outside of human experience, people have to have an external source which can percieve it as humans would. That is all I mean by needing a higher power.