Final answer:
The individual suing the nurse for negligence likely did not win because the nurse had no legal duty to act while being off-duty and did not directly cause the injuries.
Step-by-step explanation:
The individual suing the nurse for negligence failed to win a judgment likely because the nurse had no duty to act. In legal terms, a duty to act is an obligation to intervene in a situation to prevent harm to another person. While morally it might be expected that a nurse would assist someone in need, legally, the nurse has no such duty unless they have a pre-existing relationship with the individual that would require it (such as being on duty or having a duty as specified by employment or pre-existing relationship). Being off-duty, they are under no more obligation than a regular citizen. The fact that the nurse was off-duty at the time and did not cause the client's injuries plays a significant role in determining the lack of a legal duty to act.