So if the people who demonstrate the greatest piety are also those most vulnerable to faulty memory -
confabulation is a common symptom that arises when the brain seeks to make sense of incomplete or missing information; the brain 'tells a story' to fill in the details, in much the same way as you hallucinate the illusion of continuity of vision and elide out the saccading that your eyes normally do -
then your community's greatest influence, and its understanding of normative behavior, ends up having to incorporate authorities who are not consistent in their ability to maintain a solid basis of narrative in consensus reality.