after the age of 14 should be given a choice to choose and specialize in subjects they have an interest in, whether it was reading, manual skills, literature, preaching, medicine, geometry, trade and commerce, craftsmanship, or any other subject or profession they would be interested in pursuing for a future career. He wrote that this was a transitional stage and that there needs to be flexibility regarding the age in which pupils graduate, as the student's emotional development and chosen subjects need to be taken into account. The empiricist theory of 'tabula rasa' was also developed by Ibn Sina. He argued that the "human intellect at birth is rather like a tabula rasa, a pure potentiality that is actualized through education and comes to know" and that knowledge is attained through "empirical familiarity with objects in this world from which one abstracts universal concepts" which is developed through a "syllogistic method of reasoning; observations lead to prepositional statements, which when compounded lead to further abstract concepts." He further argued that the intellect itself "possesses levels of development from the material intellect (al-‘aql al-hayulani), that potentiality that can acquire knowledge to the active intellect (al-‘aql al-fa‘il), the state of the human intellect in conjunction with the perfect source of knowledge." Ibn Tufail In the 12th century, the Andalusian-Arabian philosopher and novelist Ibn Tufail (known as "Abubacer" or "Ebn Tophail" in the West) demonstrated the empiricist theory of 'tabula rasa' as a thought experiment through his Arabic philosophical novel, Hayy ibn Yaqzan, in which he depicted the development of the mind of a feral child "from a tabula rasa to that of an adult, in complete isolation from society" on a desert island, through experience alone. Some scholars have argued that the Latin translation of his philosophical novel, Philosophus Autodidactus, published by Edward Pococke the Younger in 1671, had an influence on John Locke's formulation of tabula rasa in "An Essay Concerning Human Understanding". Modern Michel de Montaigne Child education was among the psychological topics that Michel de Montaigne wrote about. His essays On the Education of Children, On Pedantry, and On Experience explain the views he had on child education. Some of his views on child education are still relevant today. Montaigne's views on the education of children were opposed to the common educational practices of his day. He found fault both with what was taught and how it was taught.