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first principle(expression, reason, importance, significance)
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fundamental cause(expression, reason, importance, significance)
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fundamental premise(expression, reason, importance, significance)
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fundamental principle(expression, reason, importance, significance)
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fundamental reason(expression, reason, importance, significance)
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fundamental term(expression, reason, importance, significance)
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initial cause(expression, reason, importance, significance)
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issue main reason(expression, reason, importance, significance)
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key condition(expression, reason, importance, significance)
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key element(expression, reason, importance, significance)
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key enabler(expression, reason, importance, significance)
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key factor(expression, moment, influence, importance)
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key idea(expression, reason, importance, significance)
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key pillar(expression, reason, importance, significance)
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key reason(expression, reason, importance, significance)
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main cause(expression, reason, importance, significance)
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main condition(expression, reason, importance, significance)
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main criterion(expression, reason, importance, significance)
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main culprit(expression, reason, importance, significance)
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main reason(expression, reason, importance, significance)
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APASmart Define. (2015). decisive point thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/decisive_point/thesaurus/synonyms
ChicagoSmart Define. 2015. "decisive point thesaurus" https://smartdefine.org/decisive_point/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, decisive point thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/decisive_point/thesaurus/synonyms>.
MLASmart Define. "decisive point thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/decisive_point/thesaurus/synonyms>