What term did Plato use to address the problems of universals?

Plato's approach to the problems of universals is best encapsulated by the concept of Extreme Realism. In his philosophy, Plato suggested that abstract forms or ideas, which he called "Forms" or "Ideas," represent the most accurate reality. He believed these Forms are more real than the objects we perceive in the physical world, which are merely imperfect manifestations of these ideal forms.

Extreme Realism, as a term, relates to Plato's understanding of the nature of reality and the existence of universals, asserting that universal concepts exist independently of their instances in the material world. This perspective highlights the distinction between the ideal and the concrete, a fundamental aspect of Plato's philosophical inquiry into the nature of knowledge and reality. Thus, selecting Extreme Realism would indicate a recognition of Plato’s view that there is a realm of perfect, unchanging forms that transcends the variability of the sensory world.

In contrast, the other terms do not accurately represent Plato's stance or philosophical framework concerning universals. They may refer to different philosophical articulations or alternative views that do not capture the essence of Plato's ideas.