Louis Brandeis, Chicago Railway Company v. United States…
“ It is argued that, as a matter of law, a carrier cannot be guilty of unjust discrimination unless it is able by its own act to remove the inequality; that where there is no direct physical connection with the railroad alleged to be discriminated against, and no joint service is being rendered by the three steam railroads with the South Shore, there cannot, in law, be unjust discrimination, because the existing inequality can be removed only by the consent of a third party, the intermediate carrier. ”
