As I understand it, "absolute truth" refers to when all actors in all interactions know and understand everything relevant to their interactions - and that will obtain the theoretical optimal equilibrium.
Problem is, to know everything relevant, you must know everything - otherwise, how do you know that what you don't know isn't relevant? Since this is obviously not possible, you strive for the best approximation. Sovjet-style communism attempted to set up a political system to handle all this knowledge, and failed miserably. Free market capitalism, with free price formation and supply and demand seems to be an orders-of-magnitude better approximation.
Problem is, to know everything relevant, you must know everything - otherwise, how do you know that what you don't know isn't relevant? Since this is obviously not possible, you strive for the best approximation. Sovjet-style communism attempted to set up a political system to handle all this knowledge, and failed miserably. Free market capitalism, with free price formation and supply and demand seems to be an orders-of-magnitude better approximation.