The ADA itself does not delineate "major life activities." The EEOC has defined such activities in regulations, although whether it had the authority to do so has not been decided by the Supreme Court. The regulations define major life activities as "caring for oneself, performing manual tasks, walking, seeing, hearing, speaking, breathing, learning, and working" (9). In addition, the EEOC's interpretive guidelines, which emphasize that this list is not exhaustive, further define major life activities as "basic activities that the average person in the general population can perform with little or no difficulty" (10). In addition, courts have ruled that other activities can be considered major life activities under the ADA—for example, reproduction (11) and engaging in interpersonal relationships (12).