Plato introduces the theory of imitation, which argues that art and literature are imitations of nature rather than reflections of truth or reality. According to Plato's theory, a painter's depiction of a chair is twice removed from the truth since it is an imitation of the carpenter's physical chair, which itself is an imitation of the ideal "chair" form. Plato believed that literature could misguide society and corrupt youth, and thus wanted to ban poets from his republic. However, the conclusion is that while Plato makes a valid point about imitation, poetry is not inherently harmful.