In the 1891 case of Texas and Pacific Railway Company v. Cox, the U.S Supreme Court ruled in favor of Texas and Pacific Railway Company. The dispute arose when a train conductor, employed by the railway company, was injured while on duty due to an alleged negligence on part of his fellow employees. He sued for damages under federal law which allowed such suits against common carriers engaged in interstate commerce. However, at that time he was operating within state lines (Texas), not across states as defined by interstate commerce laws. The court held that even though the railway company operated both within and outside Texas borders, it could only be considered a common carrier involved in interstate trade when its operations were actually crossing state lines or directly facilitating such movement. Therefore since Mr.Cox's injury occurred during intrastate operation - entirely within Texas - he couldn't sue under federal law but had to resort to relevant state laws instead.

In the dissenting opinion for Texas and Pacific Railway Company v. Cox, it was argued that the majority had erred in their interpretation of the law regarding negligence. The dissenting justices believed that there was sufficient evidence to suggest that the railway company may have been negligent in its duty to provide a safe working environment for its employees, including Mr. Cox who suffered injuries while on duty. They contended that this case should not have been dismissed at an early stage but rather presented before a jury so they could determine whether or not negligence occurred based on all available evidence and testimonies from both parties involved in this dispute. Furthermore, they disagreed with the majority's view about contributory negligence by arguing it wasn't clear if Mr.Cox contributed to his own injury due to lack of proper safety measures provided by his employer as required by law.