You're demanding an awfully high level of rigor from me for someone who has claimed an exclusively one-way cause/effect here without any kind of support or evid

You're demanding an awfully high level of rigor from me for someone who has claimed an exclusively one-way cause/effect here without any kind of support or evidence. In a system as integrated as the brain I think you'd be hard-pressed to prove that causality between two different traits can only go in one direction.