Negligence refers to the failure to exercise reasonable care that results in harm to another person. There are two theories of negligence - the subjective theory which views negligence as a state of mind, and the objective theory which is now generally accepted and views negligence as a failure to meet the standard of a reasonable person. To prove negligence, a plaintiff must show that the defendant owed them a duty of care, that duty was breached, injury resulted, and the breach caused the injury. There are tests to determine if a duty of care exists between the parties, such as foreseeability of harm, proximity of the relationship, and whether it is fair, just and reasonable to impose liability. Professionals may have a higher standard of