to alter individuals' mental processes without their consent. Freedom to self-determine Where the first obligation seeks to protect individuals from interference with cognitive processes by the state, corporations or other individuals, this second obligation seeks to ensure that individuals have the freedom to alter or enhance their own consciousness. An individual who enjoys this aspect of cognitive liberty has the freedom to alter their mental processes in any way they wish to; whether through indirect methods such as meditation, yoga or prayer; or through direct cognitive intervention through psychoactive drugs or neurotechnology. As psychotropic drugs are a powerful method of altering cognitive function, many advocates of cognitive liberty are also advocates of drug law reform; claiming that the "war on drugs" is in fact a "war on mental states". The CCLE, as well as other cognitive liberty advocacy groups such as Cognitive Liberty UK, have lobbied for the re-examination and reform of prohibited drug law; one of the CCLE's key guiding principles is that: "governments should not criminally prohibit cognitive enhancement or the experience of any mental state". Calls for reform of restrictions on the use of prescription cognitive-enhancement drugs (also called smart drugs or nootropics) such as Prozac, Ritalin and Adderall have also been made on the grounds of cognitive liberty. This element of cognitive liberty is also of great importance to proponents of the transhumanist movement, a key tenet of which is the enhancement of human mental function. Dr Wrye Sententia has emphasized the importance of cognitive liberty in ensuring the freedom to pursue human mental enhancement, as well as the freedom to choose against enhancement. Sententia argues that the recognition of a "right to (and not to) direct, modify, or enhance one's thought processes" is vital to the free application of emerging neurotechnology to enhance human cognition; and that something beyond the current conception of freedom of thought is needed. Sententia claims that "cognitive liberty's strength is that it protects those who do want to alter their brains, but also those who do not". Relationship with recognized human rights Cognitive liberty is not currently recognized as a human right by any international human rights treaty. While freedom of thought is recognized by Article 18 of the Universal Declaration of Human Rights (UDHR), freedom of thought can be distinguished from cognitive liberty in that the former is concerned with protecting an individual's freedom to think whatever they want,