The only time something should be cleansed to that degree is if someone was left gibbering in the corner for days because it triggered one of their traumas. Otherwise, evidence should be left as to what had to be reverted/deleted.
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"You know how parents tell you everything's going to fine, but you know they're lying to make you feel better? Everything's going to be fine." - The Doctor
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"You know how parents tell you everything's going to fine, but you know they're lying to make you feel better? Everything's going to be fine." - The Doctor