Read the excerpt from brown v. board of education. in each of the cases other than the delaware case, a three-judge federal district court denied relief to the plaintiffs on the so-called "separate but equal" doctrine announced by this court in plessy v. ferguson, 163 u. s. 537. the supreme court cites these cases because it seeks to describe the unique situation in delaware courts. illustrate the racial biases of federal court judges. establish the existing legal standard for education. share the unique differences between the given cases.