The supreme court ruled in plessy v Ferguson that segregation was legal. this statement is an example of what?

The statement is an example of a historical legal precedent, specifically highlighting the doctrine of "separate but equal" established by the Supreme Court in Plessy v. Ferguson (1896). This ruling upheld state laws that legalized racial segregation, reinforcing systemic discrimination. It reflects the legal justification for segregation in the United States until it was eventually overturned by Brown v. Board of Education in 1954.