Economics from Shared Reality and Distinct Persons

Economic facts concern what persons can produce, retain, transfer and use, what they can bring about together, and what their actions require of one another. These facts admit a common physical and ethical description. A complete two-person economy shows why accounts, aggregate resources and current records each lose necessary distinctions. Concrete experiments then determine its least prospective description: personal usable resources, the two assertions of each claim, and the remaining undertaking. A general representation theorem explains why this description preserves joint possibilities, ethical judgments and choices made with limited information. Its decisive condition is that every reported successor must be possible from the actual starting state. Relevant histories supply further distinctions. Accounting and comparison-cost settlement follow within their specified domains; physical measurement and experienced subjecthood enter through explicit identifications.