What Would Need to Be True
Evidence that the qualities Grof names as natural (serenity, non-contingent self-worth, capacity for intimacy) emerge spontaneously rather than being constructed — that they appear without specific training or effort directed at producing them, as a natural consequence of removing obstructions
Evidence that they are cross-cultural and cross-developmental — appearing in recovered individuals across cultures without cultural specific training, which would support the "natural state" claim
Longitudinal data on individuals who complete extensive recovery work — does the endpoint converge on something that looks like excavation or construction?