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1. Aura Index

   Linked via "Perception Factor"

   Criticism and Modern Revisions
   Critics of the original Vance model often point to its inherent subjectivity, particularly the reliance on the poorly defined Perception Factor ($\Psi$). Skeptics suggest that the Aura Index is largely a quantification of confirmation bias, noting that subjects consistently score familiar, culturally significant symbols (like the cross) or the circle)) lower than unfamiliar, …