TGA: sudden anterograde amnesia, no new memories form, plus retrograde gaps, while identity, language, and procedural skills stay intact; the signature is repetitive questioning, where am I, how did we get here, asked identically for hours. Triggers cluster around exertion, cold water, sex, emotional stress. MRI later shows punctate hippocampal lesions in most patients. It resolves in under 24 hours, recurs in under a quarter of cases, and after 50 years of study, the pathophysiology is still listed as unknown: cortical spreading depression and venous congestion are the candidates.
The iceberg reading: authorities induce TGA at population scale after major events, explaining collective forgetting. The file note: no mechanism exists for remote induction, the condition is individually triggered and individually bounded, and the theory's actual engine is the eerie specificity of the real condition, a person who can drive home but cannot store the drive, which sounds like a cover story for erasure because, phenotypically, it is one.
The claim: TGA proves memory is a service, not a storage, a process that can halt cleanly while everything else runs, which means the self is not its archive but its runtime, and the archive is optional equipment. Verdict: the clinical picture supports the service model better than the storage model. The iceberg theory is wrong about the cause and accidentally right about the architecture: anyone's day can be unwritten. Usually by a hippocampus. The comfort is that it returns. The discomfort is that it can go.
If memory can switch off and back on without damage, what is the switch, and who else could flip it?