Innatism is a philosophical and epistemological doctrine that holds that the mind is born with ideas/knowledge, and that therefore the mind is not a 'blank slate' at birth, as early empiricists such as John Locke claimed. It asserts that not all knowledge is gained from experience and the senses. Plato and Descartes are prominent philosophers in the development of innatism and the notion that the mind is already born with ideas, knowledge and beliefs. Both philosophers emphasize that experiences are the key to unlocking this knowledge but not the source of the knowledge itself. Essentially, no knowledge is derived exclusively from one's experiences as empiricists like John Locke suggested. Innatism is a philosophical and epistemological doctrine that holds that the mind is born with ideas/knowledge, and that therefore the mind is not a 'blank slate' at birth, as early empiricists such as John Locke claimed. It asserts that not all knowledge is gained from experience and the senses. Plato and Descartes are prominent philosophers in the development of innatism and the notion that the mind is already born with ideas, knowledge and beliefs. Both philosophers emphasize that experiences are the key to unlocking this knowledge but not the source of the knowledge itself. Essentially, no knowledge is derived exclusively from one's experiences as empiricists like John Locke suggested. In general usage, the terms innatism and nativism are synonymous as they both refer to notions of preexisting ideas present in the mind. However, more correctly, innatism refers to the philosophy of Plato and Descartes, who assumed that a God or a similar being or process placed innate ideas and principles in the human mind. Nativism represents an adaptation of this, grounded in the fields of genetics, cognitive psychology, and psycholinguistics. Nativists hold that innate beliefs are in some way genetically programmed to arise in our mind—that innate beliefs are the phenotypes of certain genotypes that all humans share in common. Nativism is a modern view rooted in innatism. The advocates of nativism are mainly philosophers who also work in the field of cognitive psychology or psycholinguistics: most notably Noam Chomsky and Jerry Fodor (although the latter has adopted a more critical attitude towards nativism in his later writings). The nativist's general objection against empiricism is still the same as was raised by the rationalists; the human mind of a newborn child is not a tabula rasa, but equipped with an inborn structure. In philosophy and psychology, an innate idea is a concept or item of knowledge which is said to be universal to all humanity—that is, something people are born with rather than something people have learned through experience. The issue is controversial, and can be said to be an aspect of a long-running nature versus nurture debate, albeit one localized to the question of understanding human cognition. Although individual human beings obviously vary due to cultural, racial, linguistic and era-specific influences, innate ideas are said to belong to a more fundamental level of human cognition. For example, the philosopher René Descartes theorized that knowledge of God is innate in everybody as a product of the faculty of faith. Other philosophers, most notably the empiricists, were critical of the theory and denied the existence of any innate ideas, saying all human knowledge was founded on experience, rather than a priori reasoning. Philosophically, the debate over innate ideas is central to the conflict between rationalist and empiricist epistemologies. While rationalists believe that certain ideas exist independently of experience, empiricism claims that all knowledge is derived from experience.