Variations: "I don't remember."
"I don't know."
"I don't recollect."
2. Dx for cheating significant others, or persons involved in possible criminal conduct or nefarious activities in a workplace.
Invented by President Ronald Reagan, who caught a serious case of scamnesia(later dx'd as alzheimers) during the Iran-Contra hearings in 1987
"The simple truth is, 'I don't remember - period'" - President Reagan writing to the Tower Commission to set the record straight about whether he authorized the arms shipment (to Iran)in advance.