Boundary Conditions and Failure Modes of Convergence Archaeology: A Retrospective Null-Site Analysis

Scientific validation of any experimental framework requires not only positive demonstrations but also clearly defined failure cases and boundary conditions. While Convergence Archaeology (CA) proposes that certain ancient structures may have functioned as multi-band, multi-material coherence architectures, it explicitly predicts that the majority of symbolically significant sites should not display field-system behavior. This study presents the first formal null-site analysis under CA. Using retrospective physical data from a symbolically rich but materially ordinary archaeological structure (here designated Null Site A), we test CA's falsifiable predictions against sites lacking multi-material coupling, lithic-waveguide geometry, and orientation-locked resonance. We demonstrate that Null Site A exhibits broad-band acoustic dissipation, absence of orientationstable modes, no detectable multi-layer material coupling, and no evidence of physical field amplification beyond conventional single-layer architectural behavior. These results establish CA's explicit failure boundary, confirm that symbolic importance alone does not predict coherence architecture, and demonstrate that CA does not trivially classify all monumental sites as engineered field systems. This paper closes a first empirical loop for CA by showing where the framework collapses under null conditions, thereby satisfying the core scientific requirement of constrained falsifiability.