What was the primary argument used by homer plessy the plaintiff

Explanation:

African-American Homer Plessy (1862-1925) with his plaintiff in Plessy v. Ferguson (1882), was an inspiring figure for the generations of the Civil Rights Movement. Plessy bought a first-class ticket in East Louisiana Railroad and sat in the "whites only" section. Stating he was 1/8 black only -since he was mixed and actually his great-grandmother was the one originally from Africa, he remained seated until expelled from the train and taken to jail. He was freed only paying the bailout of $500.  

After his 13th and 14th amendment rights were violated, he took the case to court where Judge John Howard Ferguson presiding. Plessy was found guilty. Later on, in 1896 the case was taken to the U.S. Supreme Court but the final decision was not any different.