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Intellectually, ideas may be expressed in a hierarchical form.  An idea common in [[philosophy]] is the "hierarchy of needs," a theory proposed by [[Abraham Maslow]], who argued that each individual must meet different needs in ascending order before attaining [[self-actualization]], the pinnacle of human self-awareness.<ref>http://honolulu.hawaii.edu/intranet/committees/FacDevCom/guidebk/teachtip/maslow.htm</ref>

Intellectually, ideas may be expressed in a hierarchical form.  An idea common in [[philosophy]] is the "hierarchy of needs," a theory proposed by [[Abraham Maslow]], who argued that each individual must meet different needs in ascending order before attaining [[self-actualization]], the pinnacle of human self-awareness.<ref>http://honolulu.hawaii.edu/intranet/committees/FacDevCom/guidebk/teachtip/maslow.htm</ref>

[[Taxonomy]] refers to a generic structure or classification system into which items may be classified based on units referred to as taxa (singular taxon). It often takes the form of a hierarchical ordering of taxa.

[[Taxonomy]] refers to a generic structure or classification system into which items may be classified based on units referred to as taxa (singular taxon). It often takes the form of a hierarchical ordering of taxa, as expressed in [[Linnaean taxonomy]].

==References==

==References==

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