In an era when technology promises to render the body fully legible, a growing number of physicians are pausing to ask whether seeing everything inside a healthy person is the same as knowing something useful. Full-body MRI scans have become fashionable among the affluent and the anxious, marketed by longevity clinics as a form of preventive mastery — yet the medical establishment finds little evidence that such comprehensive imaging improves outcomes for those without symptoms. The debate is not merely clinical; it is a philosophical reckoning with the difference between information and wisdo