The concept of "true-truth" was introduced and explained by Francis Schaeffer in the 1970s to provide a foundation for discussion and dialogue with the "modern-man." Today, we recognize that the "modern-man" is really an individual who has been shaped by post-modern philosophies, especially deconstructionism and Hegelian dialectic theory.
How do these philosophies play out in culture? Most people can't identify the big idea, but they can see the end result - current marketing campaigns such as "You do you" are a perfect example of deconstructionism.
What does this mean for the average believer or unbeliever? The discussion focuses on presuppositions and truth foundations and their practice in everyday life.