This used to be a common idiom/cliche, then faded from sight, then became The Bourne Supremacy: the character gets Amnesia. A lot of older shows had an "amnesia" episode.

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Todd (Bowie, MD, US, North America, Earth, Sol System, Vega region, Local Bubble, Orion arm, Milky Way Galaxy, Local Group, Virgo A Cluster, Virgo supercluster, the universe in which spock is clean shaven)

Quidquid latine dictum sit, altum sonatur.

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