Friday, February 12, 2016

Realist vs Anti Realist

Sometime in the 300s BC, the Greek Philosopher Plato, writing in the voice of his teacher, Socrates, introduced his theory of Forms through a short thought experiment in Republic known as “the Allegory of the Cave.”  It can be summarized like this:

All your life you have been chained to a wall in a dark cave. Your head is restrained so you can only look at the blank wall in front of you. Behind you is a large fire, and every so often someone walks between you and the fire, holding a different object each time so as to cast a different shadow on the wall in front of you. The sound and smell of the fire, the constantly changing shadows on the wall in front of you, and the voices of your fellow captives are all that you think, know, and talk about. Suddenly, your captor releases you and allows you to walk around the cave. For the first time in your life, you see the fire. After noticing all the objects that your captor had carried to cast the shadows which you previously thought were reality, you come to understand their true origin. Eventually you are allowed outside of the cave, where the sun shines everywhere and you finally understand the true nature of your surroundings.

The theory of Forms is the idea that there are perfect, unchanging, and definitive truths (Forms) that exist separately from what we as humans think we know as truth. For example, a blue shirt is not blue in a dark room, therefore there must exist some perfect and unchanging idea of “blue” that exists outside of its characterization of the shirt. The quality of universal “blueness” exists independently of things that we call “blue.”  Similarly, an action that a person performs might not be viewed as appropriate or justified from every person’s point of view, but somewhere there must exist some ultimate Form of Justice. The quality of justice exists independently of whether we as humans think an action is just. The Forms are symbolized by the outside world in the allegory, known by Plato as the “realm of being” while the cave itself represents the ordinary world we as humans, or captives, perceive on a daily basis, called the “realm of becoming.” The constantly changing shadows represent the constantly changing world that we experience.

Plato’s views prompted a long philosophical debate that extends to modern philosophy. He believed that there is a ‘realm’ where universal truths and qualities exist independently of the actions and objects we label them with, a view known as the Realist or Platonist view. On the other side of the debate is the anti-realists or nominalists, who believe that there is no universal truth, and that the quality of anything is essentially in the mind of each individual person. The realist would believe that ideas, facts, ethics, or principles can exist without a single person knowing it, while the anti-realist would say that these are all human creations, and there is no ultimate truth. So which one are you?

Note: The allegory ends with you, the now enlightened one, returning to the cave to free your fellow captives and share your enlightenment. However, rather than seeming happy, they yell at you, call you crazy, and don’t even want to listen to you speak. This is may be symbolic of the fate of Plato’s teacher, Socrates, who refused the Athenian government orders to stop teaching philosophy and was eventually executed. It also suits to symbolize the issues that philosophers faced in those days when they tried to teach knowledge and wisdom to people.

Full text of the allegory: https://web.stanford.edu/class/ihum40/cave.pd

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