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 (ĭn′to͞o-ĭsh′ə-nĭz′əm, -tyo͞o-)
n. Philosophy
1. The theory that certain truths or ethical principles are known by intuition rather than reason.
2. The theory that external objects of perception are immediately known to be real by intuition.
3. The view that the subject matter of mathematics consists of the mental or symbolic constructions of mathematicians rather than independent and timeless abstractions, as is held in Platonism.

in′tu·i′tion·ist n.


(ˌɪntjʊˈɪʃəˌnɪzəm) or


1. (Philosophy) (in ethics)
a. the doctrine that there are moral truths discoverable by intuition
b. the doctrine that there is no single principle by which to resolve conflicts between intuited moral rules. See also deontological
2. (Philosophy) philosophy the theory that general terms are used of a variety of objects in accordance with perceived similarities. Compare nominalism, Platonism
3. (Logic) logic the doctrine that logical axioms rest on prior intuitions concerning time, negation, and provability
4. (Logic)
a. the theory that mathematics cannot intelligibly comprehend the properties of infinite sets, and that only what can be shown to be provable can be justifiably asserted
b. the reconstruction of mathematics or logic in accordance with this view. Compare formalism, logicism, finitism
5. (Philosophy) the doctrine that knowledge, esp of the external world, is acquired by intuition
ˌintuˈitionist, ˌintuˈitionalist n


(ˌɪn tuˈɪʃ əˌnɪz əm, -tyu-)

1. the doctrine in ethics that moral values and duties can be discerned directly.
2. (in metaphysics)
a. the doctrine that in perception external objects are given immediately, without the intervention of a representative idea.
b. the doctrine that knowledge rests upon axiomatic truths discerned directly.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.intuitionism - (philosophy) the doctrine that knowledge is acquired primarily by intuition
philosophy - the rational investigation of questions about existence and knowledge and ethics
philosophical doctrine, philosophical theory - a doctrine accepted by adherents to a philosophy
References in periodicals archive ?
More recently, in the 20th century, the intuitionists went further and came to regard proof by contradiction as an invalid method of reasoning.
Contrary to Platonists, Intuitionists argue that mathematical truth is a mind-dependent phenomenon.
He suggests, instead, that intuitionists should attend to the roles played by experience and particular, contextual judgments in forming moral beliefs.
In general, intuitionists deny that there is any external reality to mathematical objects.
Chapter 6 completes Kaspar's reply to the epistemological challenge by showing how intuitionists can use moral kinds to give an account of moral facts, including their relationship to the natural facts to which they are intimately related.
Since, accordingly, the understanding of LEM varies between intuitionists and classical logicians, it is unsurprising and fairly uninteresting that its justifiability (or lack thereof) does too.
Such situations can hinder any principle (not only the excluded middle, as the intuitionists put it
George Hourani's pioneering study of 'Abd al-Jabbar's ethics (1971) is criticized for treating 'Abd al-Jabbar as if he were doing moral philosophy, in this case along the lines of the twentieth-century British intuitionists.
It appears that this point should be conceded by moral theorists of all brands, from error-theorists (2), through constructivists of various persuasions, including subjectivist and rationalist versions (Harman 1975, Korsgaard 1997) (3), to intuitionists (4).
Furthermore, Salerno points out, intuitionists (and antirealist metaphysicians are typically intuitionistic logicians) typically do not wish to be committed to the claim that every sentence is decidable.
Rogers at the behest of the Intuitionists to see if she might have the plans for Fulton's perfect elevator, Mrs.