Plessy V. Ferguson was only a landmark decision in the Supreme Court of the United States issued in 1896. The impact of Plessy v. Ferguson allowed the statement "Separate but equal" also known as segregation to become law in U.S. After this event, Jim Crow laws which were a system of laws meant to discriminate against African Americans, spread across the United States.
Unification of east and west germany
I believe the answer is Dunning-Kruger effect
Dunnig-Kruger effect happens when <span> Someone with low ability suffer from illusory superiority,
This make them actually believe that they're actually better than other people even though they do not possess any actual achievement/proof to backed their perception.</span>
Answer:
54d. The Sit-In Movement. Students from across the country came together to form the Student Nonviolent Coordinating Committee (SNCC) and organize sit-ins at counters throughout the South.
Explanation:
If this question is based on Billy Milligan story, than yes :) There were real examples, although just a few of them during the whole history, or maybe noone knew about such a syndrome earlier.