Al Farabi was born in Farab Turkistan. He was known as Al Pharabius in the West and was known as one of the greatest teachers to come after Aristotle. He was a scholar who was capable to proficiently write and converse in 5 languages. His greatest contribution was to the field of Logic where he developed two categories, Idea and Proof. He wrote a book on the principles of sound called Kitab Al Musika al Kabeer. His commentary on Aristotle’s work was so well crafted it impressed the likes of Ibn Sina.