In philosophy, rationalism is the epistemological view that "regards reason as the chief source and test of knowledge" or "the position that reason has precedence over other ways of acquiring knowledge", often in contrast to other possible sources of knowledge such as faith, tradition, or sensory experience. More formally, rationalism is defined as a methodology or a theory "in which the criterion of truth is not sensory but intellectual and deductive".
In a major philosophical debate during the Enlightenment, rationalism (sometimes here equated with innatism) was opposed to empiricism. On the one hand, rationalists like René Descartes emphasized that knowledge is primarily innate and the intellect, the inner faculty of the human mind, can therefore directly grasp or derive logical truths...
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Città del Vaticano - Cupola della Basilica di S. Pietro
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Avicenna Portrait on Silver Vase - Museum at BuAli Sina (Avicenna) Mausoleum - Hamadan - Western Ira...
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An icon to represent "global thinking".
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Immanuel Kant, painted portrait, c1790. Kant (1724-1804) was a German philosopher and one of the cen...
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The School of Athens (detail). Fresco, Stanza della Segnatura, Palazzi Pontifici, Vatican.
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Portrait of René Descartes, bust, three-quarter facing left in an oval border. [Still image]: [print...
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Detail of Pythagoras with a tablet of ratios, numbers sacred to the Pythagoreans, from The School of...
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From http://hypernews.ngdc.noaa.gov
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William of Ockham, from stained glass window at a church in Surrey.