Does glymphatic enhancement from sleep interventions directly cause tau clearance or merely correlate with sleep improvement?

The mechanistic chain from sleep intervention to glymphatic flow to actual tau clearance lacks direct experimental validation. Alternative explanations like general sedation effects were raised but not definitively ruled out. Source: Debate session sess_sda-2026-04-01-gap-v2-18cf98ca (Analysis: sda-2026-04-01-gap-v2-18cf98ca)