Philosophers have often wondered how we recognize so many different objects as belonging to one group even though they all look different, such as tables for instance. How is it that we recognize the table properties from the finite set of tables that we have seen in our life? Plato's solution to this was that this information is a priori in nature. Our mind somehow connects to the Realm of Forms where the essence of everything lies. Our mind understands tableness from the absolute table that lies in the Realm of Forms and then recognizes similar objects in the world in which we exist. According to this theory, the essence of good, evil, and everything else we know resides there to give us an absolute basis on which to make judgements.

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