The document discusses the tort of negligence. It defines negligence as a carelessness amounting to a breach of duty that causes foreseeable harm. To establish negligence, a claimant must prove the defendant owed them a duty of care, breached that duty, and caused harm. The standard for determining breach is reasonableness. Contributory negligence can reduce damages if the claimant also acted unreasonably. The landmark case Donoghue v Stevenson established the modern duty of care by recognizing liability for harm from defective products.