Tabula rasa (Latin: blank slate) refers to the epistemological thesis that individual human beings are born with no built-in mental content, in a word, "blank", and that their entire resource of knowledge is built up gradually from their experiences and sensory perceptions of the outside world.
Generally proponents of the tabula rasa thesis favor the "nurture" side of the nature versus nurture debate, when it comes to aspects of one's personality, social and emotional behavior, and intelligence.
Then the 11th century, the theory of tabula rasa was developed more clearly by the Persian philosopher, Ibn Sina (known as "Avicenna" in the Western world). 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 at conjunction with the perfect source of knowledge.
In the 12th century, the Andalusian-Arabian philosopher and novelist Ibn Tufail (known as "Abubacer" or "Ebn Tophail" in the West) demonstrated the 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. The Latin translation of his philosophical novel, entitled 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.
In the 13th century, St. Thomas Aquinas brought the Aristotelian and Avicennian notions to the forefront of Christian thought. These notions sharply contrasted with the previously held Platonic notions of the human mind as an entity that pre-existed somewhere in the heavens, before being sent down to join a body here on Earth (see Plato's Phaedo and Apology, as well as others). St. Bonaventure (also 13th century) was one of Aquinas' fiercest intellectual opponents, offering some of the strongest arguments towards the Platonic idea of the mind.
The writings of Avicenna, Ibn Tufail and Aquinas on the tabula rasa theory stood unprogressed for several centuries. In fact, our modern idea of the theory is mostly attributed to John Locke's expression of the idea in An Essay Concerning Human Understanding in the 17th century. In Locke's philosophy, tabula rasa was the theory that the (human) mind is at birth a "blank slate" without rules for processing data, and that data is added and rules for processing are formed solely by one's sensory experiences. The notion is central to Lockean empiricism. As understood by Locke, tabula rasa meant that the mind of the individual was born "blank", and it also emphasized the individual's freedom to author his or her own soul. Each individual was free to define the content of his or her character - but his or her basic identity as a member of the human species cannot be so altered. It is from this presumption of a free, self-authored mind combined with an immutable human nature that the Lockean doctrine of "natural" rights derives.
Tabula Rasa is also featured in Sigmund Freud's psychoanalysis. Freud depicted personality traits as being formed by family dynamics (see Oedipus complex, etc.). Freud's theories show that one can downplay genetic and congenital influences on human personality without advocating free will. In psychosanalysis, one is largely determined by one's upbringing.
The tabula rasa concept became popular in social sciences in the 20th century. Eugenics (mainstream in the late 19th and early 20th centuries) came to be seen not as a sound policy but as a crime. The idea that genes (or simply "blood") determined character took on racist overtones. By the 1970s, some scientists had come to see gender identity as socially constructed rather than rooted in genetics (see John Money), a concept still current (see Anne Fausto-Sterling). This swing of the pendulum accompanied suspicion of innate differences in general (see racism) and a propensity to "manage" society, where the real power must be if people are born blank.
In the last few decades, twin studies, studies of adopted children, and the David Reimer case have demonstrated genetic influence on (if not strict determination of) personal characteristics, such as IQ, alcoholism, gender identity, and other traits.
The theory of tabula rasa is contradicted in William Golding's novel, Lord of the Flies. Golding wrote the book in hope of proving that all humans are born with an innate evil, and it is the job of humans to contain that evil.
Locke's idea of tabula rasa is frequently compared with Thomas Hobbes's viewpoint of human nature. Like Golding, Hobbes contradicts tabula rasa- he believes that all humans are inherently evil and selfish.
In reality autonomous agents are provided with an initial data-set or knowledge-base, but this should not be immutable or it will hamper autonomy and heuristic ability. Even if the data-set is empty, it can usually be argued that there is an in-built bias in the reasoning and planning mechanisms. Either intentionally or unintentionally placed there by the human designer, it thus negates the true spirit of tabula rasa.
The American alternative rockband Sinch has a song called "Tabula Rasa" on their major self-titled debutalbum, released in 2002 through Roadrunner Records.