George Shiras, Jr.,
Texas Railway Company v. Interstate Commerce Commission…
“ The third section forbids any undue or unreasonable preference or advantage in favor of any person, company, firm, corporation, or locality; and as there is nothing in the act which defines what shall be held to be due or undue, reasonable or unreasonable, such questions are questions not of law, but of fact. The mere circumstance that there is in a given case a preference or an advantage does not, of itself, show that such preference or advantage is undue or unreasonable, within the meaning of the act. ”
