Abstract. The paper represents an excerpt from an ambitious research program concerning the economic epistemology rebuilding (including, especially, new conjectures upon the sobject - the subject-object package). It is aimed to propose and operate a logical approach and assessment of six crucial concepts used in modeling of a pseudo-natural process like the economic (or social) process: system, optimal economic process, sustainable economic process, logically vivid system, network, and emergence. Firstly, all these concepts are identified, described and characterized by a set of sufficient, respectively necessary predicates, in an attempt to define them logically. Secondly, based on the mentioned predicates, six theorems (and their converses) are formulated and demonstrated among the concepts concerned. This non-orthodox approach could open a road to recuperate the possibility for economic science (or economic theory?) to be rebuilt by new philosophical and logical bases.

Keywords: logically vivid system; network; emergence; system; sustainability; economic process.