What did the other person or business actually have to do to keep people reasonably safe? That is the real question behind duty of care. It means a legal obligation to act with the level of caution that a reasonably careful person or organization would use under the circumstances. Not perfection, and not a guarantee that nobody gets hurt. A driver must operate a car safely, a property owner must address known hazards, and an employer must provide a reasonably safe workplace. Whether a duty exists depends on the relationship between the parties and whether the risk was foreseeable.

Bad advice often treats every accident like automatic fault. It is not. An injury claim usually starts by showing the defendant owed a duty, then breached it, and that the breach caused the harm. If no duty existed, or the danger was not reasonably predictable, a negligence claim can fall apart fast.

In New York, duty of care comes up constantly in winter crashes and worksite injuries. A motorist on the Long Island Expressway during a nor'easter still has to slow down and drive for conditions; "the weather was bad" is not a free pass. On the other hand, snow or lake-effect conditions near Buffalo can affect what precautions were reasonable. In injury cases, New York's pure comparative negligence rule under CPLR 1411 allows damages to be reduced if the injured person also failed to use reasonable care.