A Physical No-Go Framework for Atlantis Observer-Limited Catastrophe, Memory, and the Necessity of Incomplete Erasure

This work presents a physics-only no-go framework for Atlantis, treating it not as a historical claim or mythological allegory, but as a signal constrained by physical law and observer limits. Using conservation, locality, thermodynamics, stability, and irreversibility, the framework analyzes what kind of real-world event could generate and sustain an Atlantis-like narrative when observed, survived, and transmitted by finite human systems operating under stress. The analysis rules out continent-scale submergence, total erasure, instantaneous global destruction, and technologically anomalous civilizations as physically impossible. Instead, it demonstrates that the existence of the Atlantis narrative itself implies a localized, catastrophic, survivable event with incomplete destruction and unavoidable material traces, compressed over time by observer-limited memory. The result is not a reconstruction of Atlantis, but a closure of the physically realizable alternative space.