Which accurately describes what Plessy v. Ferguson and Brown v. Board of Education had in common?

Both cases dealt with the Fourteenth Amendment’s guarantee of equal protection under the law. In Plessy v. Ferguson, the Court used that amendment to uphold racial segregation under the “separate but equal” doctrine; in Brown v. Board of Education, it ruled that segregated public schools violated equal protection. So both involved interpreting the Fourteenth Amendment, even though they reached opposite conclusions about segregation.

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