Principlev1
Use external observers or comparison photography at regular
Use external observers or comparison photography at regular intervals to detect environmental drift that habituation has rendered invisible to the inhabitant.
Why This Is a Principle
Derives from Attention as Gate to Conscious Perception (attention is capacity-limited, creating perceptual blindness) and The nervous system habituates to repeated, predictable (habituation to repeated stimuli). The principle prescribes using external perception systems to overcome the inhabitant's inevitable habituation blindness.