Answer:
The Supreme Court ruling on Plessy v. Ferguson in 1896 established the "separate but equal" doctrine in the United States public education system.
Step-by-step explanation:
The case was based on an incident 1892 where Plessy violated the rule by entering the same train cart with whites which was illegal as at then in the state of New Orleans according to the Separate Car Act of 1890. He was charged and his defense was that the segregation of blacks from using the same train car with blacks was a violation of the United States constitution and lost the case. He appealed to the United States Supreme Court and also lost. The Supreme Court ruled that although the Fourteenth Amendment to the constitution establishes both whites and blacks as equal, it could not eliminate other social classifications based on race.