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{{Otheruses4|Intuition|other uses|Intuition}}
'''Intuition''' is "the immediate apprehension of an object by the mind without the intervention of any reasoning process" [Oxford English Dictionary].
'''Intuition''' is "1 : Immediate apprehension or cognition without reasoning or inferring
== External Link==▼
2 : knowledge or conviction gained by intuition
3 : The power or faculty of gaining direct knowledge or cognition without evident rational thought and inference." [Merriam-Webster]
==Intuition in philosophy==
The act by which the mind perceives the agreement or disagreement of two ideas. The [[truth]] of the [[proposition]]s is immediately known then the moment they are presented. This is without the intervention of other [[idea]]s or [[deductive reasoning]].<ref>American International Encyclopedia, J.J. Little Co., New York 1954, Vol VIII </ref>
Some philosophers consider human experience of raw empirical data (sometimes called "[[qualia]]") to be intuitive. For example, when a person sees a patch of yellow, that person is directly , while opinion is based on that experience. Intuition also differs from [[instinct]], which does not necessarily have the experiential element at all. A person who has an intuitive basis for an opinion probably cannot immediately fully explain why he or she holds that view. However, a person may later rationalize an intuition by developing a chain of logic to demonstrate more structurally why the intuition is valid{{Fact|date=April 2007}}.
In popular understanding, intuition is one source of [[common sense]] and it may also help in [[Inductive reasoning|induction]] to gain empirical knowledge{{Fact|date=April 2007}}.
In the [[philosophy]] of [[Immanuel Kant]], intuition is one of the basic [[cognitive]] faculties, equivalent to what might loosely be called [[perception]]. Kant held that our [[mind]] casts all of our external intuitions in the form of [[space]], and all of our internal intuitions ([[memory]], thought) in the form of time{{Fact|date=April 2007}}.
[[Intuitionism]] is a position in [[philosophy of mathematics]] derived from Kant's claim that all [[mathematics|mathematical knowledge]] is knowledge of the pure forms of the intuition - that is, intuition that is not empirical (''Prolegomena, p.7'').
[[Intuitionistic logic]]s are a class of [[logic]]s, devised and advanced by [[Arend Heyting]] and [[Luitzen Egbertus Jan Brouwer]] and more recently by [[Michael Dummett]], to accommodate intuitionism about [[mathematics]] (as well as [[anti-realism]] more generally). These logics are characterized by rejecting the [[law of excluded middle]]: as a consequence they do not in general accept rules such as [[disjunctive syllogism]] and [[reductio ad absurdum]]. Intuitionism is a form of [[constructivism (mathematics)|constructivism]]{{Fact|date=April 2007}}.
A situation which is or appears to be [[truth|true]] but violates our intuition is called a [[paradox]] (a paradox can also be a logical self-contradiction). An example of this is the [[Birthday paradox]]{{Fact|date=April 2007}}.
A few systems act in a [[counter-intuitive]] way. Attempts to change such systems often lead to [[unintended consequence]]s{{Fact|date=April 2007}}.
Intuition plays a key role in [[Romanticism]], and it is the highest form of [[skill]] acquisition in the [[Dreyfus model|Dreyfus and Dreyfus model]]{{Fact|date=April 2007}}.
== Intuition in psychology ==
Intuition is one of Swiss [[psychology|psychologist]] [[Carl Jung]]'s four '[[Psychological Types|psychological types]]' or ego functions. In this early model of the personal psyche, intuition was opposed by sensation on one axis, while feeling was opposed by thinking on another axis. Jung argued that, in a given individual, one of these four functions was primary — most prominent or developed — in the consciousness. The opposing function would typically be underdeveloped in that individual. The remaining pair (on the other axis) would be consciously active, but to a lesser extent than the primary function. <ref>C.G. Jung. ''Psychological Types''. Bollingen Series XX, Volume 6, Princeton University Press, 1971.</ref> This schema is perhaps most familiar today as the [[Myers-Briggs Type Indicator]].
In psychology, intuition can encompass the ability to know valid solutions to problems and [[decision making]]. For example, the [[Recognition Primed Decision]] (RPD) model was described by [[Gary A. Klein|Gary Klein]] in order to explain how people can make relatively fast decisions without having to compare options. Klein found that under time pressure, high stakes, and changing parameters, experts used their base of experience to identify similar situations and intuitively choose feasible solutions. Thus, the RPD model is a blend of intuition and analysis. The intuition is the pattern-matching process that quickly suggests feasible courses of action. The analysis is the mental simulation, a conscious and deliberate review of the courses of action{{Fact|date=April 2007}}.
An important intuitive method for identifying options is [[brainstorming]]{{Fact|date=April 2007}}. According to the renowned [[Neuropsychologist]] and [[Neurobiologist]] [[Roger Wolcott Sperry]] though, Intuition is a right-brain activity while Factual and Mathematical analysis is a left-brain activity[http://jaie.asu.edu/sp/V21S3bra.htm].
==See also==
* [[Extra-sensory perception]]
* [[Intuitionism]]
* [[Medical intuitive]]
* [[Tacit knowledge]]
* [[Casuistry]]
* [[Unconscious mind]]
* [[Preconscious]]
* [[Subconscious]]
* [[List of thought processes]]
* [[Portal:thinking]]
== Notes and references ==
<references />
* [http://www.awakening-intuition.com/articalsintuition.html A selection of articles defining the nature of Intuition]
* [http://samvak.tripod.com/intuition.html Essay about the philosophical and psychological dimensions of four types of intuition]
* [http://www.intuition-sciences.com/introduction A scientific research group on intuition]
* [http://www.amherst.edu/askphilosophers/question/1533 Ask Philosophers: Question on Intuition and Rationality]
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