@Fil Albuquerque,
Quote:you need two operators to establish an operation...function depends on contextual systemic background, and value arises in it...
You seem to be referring to emergent, supervenient, or irreducible properties in a natural system. For example, the identity relation between H2O molecules and the property of "wetness"; or the identity relation between brain structures and consciousness. You'll notice that we're still talking about one and the same natural object or system, just at different levels of description. This is an epistemic issue insofar as we're unable to decompose the descriptive identity of one concept into the other. However, there is no logical or metaphysical contradiction.
One way to tackle this problem is to treat irreducible properties through a system of transcendental logic (e.g., Hegelian metaphysics) rather than with an empirical theory. That is, the interrelations and consequences between levels of identity could be mapped out in conceptual terms by a priori reasoning. If performed successfully, you could derive an ordered set of values, organized in the context of their priority or finality; lower-order values would be logically entailed by higher-order values. With this knowledge in hand, metaphysical principles could be built to specify the ends and values of an ideal society. These principles would serve as a kind of "grundnorm" (or pure normativity) to structure real institutional practices. So, basically, you don't need to begin your analysis of the practical Good from the perspective of concrete social realities (i.e., empirical science); you could define it from the perspective of ideal institutional forms (i.e., pure practical reason); then work backwards.