It can safely establish a hierarchy of priorities and of preferences - but it must present all the possibilities and only then make a selection while giving good reasons for doing so. The symbol system must have links to other, relevant, symbol systems. These are all external variables, external symbol systems. They all failed and resulted in the establishment of a formal, or an informal, hierarchy. This is not a theoretical demand.
Utility functions dictate most of the investment decisions in today's complex financial markets.
He must fix and detail his preferences, priorities, needs and requirements. If he were to attach equal weight to all the parts of the Business Plan, his message will confuse those who are trying to decode it and they will deny his application. When a computer faces a few tasks simultaneously - it prioritizes them and allocates its resources in strict compliance with this list of priorities. A computer is the physical embodiment of a symbol system - and so is a bank doling out credit. The same principles apply to the human organism.