Therefore, many philosophers disagreed with each other and found very different answers for the same concepts. Even Plato did not know the answers to all the questions that arose in the pre-Socratic era. Plato decided to look back to the pre-Socratic era, specifically the philosophers Heraclitus and Parmenides. He agreed with Heraclitus who believed that our world was constantly changing and with Parmenides who believed that the real world was not the same as the world of our experience. Plato chose to look at materialism and also his theory of Forms in a two-world context to attempt to answer the questions of the universe. The two worlds Plato talks about are: a world in constant flux (the world we live in) and a world in constant evolution (the real world, otherwise known as the Forms). Plato's Forms distinguishes things that are real from things in our minds that we perceive as real. Plato also argued that reality is different from our mundane experience. Plato believed that material objects could imitate forms because they have order, however Aristotle disagreed. However, Aristotle thought that Plato's concept of “participation” made no sense. Aristotle believed that the world we live in is our reality and supported Plato's idea of ​​forms