During the 1970s, Ekman developed a method called the Facial Action Coding System (FACS) to measure all visually discernible facial movement.
Ekman has invented only FACS and nothing else.
mnli hypothesis: Ekman has invented only FACS and nothing else. premise: During the 1970s, Ekman developed a method called the Facial Action Coding System (FACS) to measure all visually discernible facial movement.