This document is conceptually connected to earlier works (V1 and V2) in the same series.While V1 and V2 explore whether Earth-like planets could exist from theoretical and physical perspectives, this work shifts focus to a different question: under what conditions a planet might meaningfully be classified as “Earth.” The framework is explicitly hypothetical and non-definitive, proposing criteria for Earthness without asserting physical certainty or empirical claims. Contact : qwerza12mn@gmail.com
Jaeho Ryu (Sun,) studied this question.