51 entries under theory topic. ×

11
prerequisite(noun, condition, need, essential, certainty)
8
condition(noun, essential, essence, basic)
8
precondition(noun, condition, need, essential, certainty)
5
qualification(noun, condition, essential, requirement)
2
postulate(noun, condition, essential, requirement)
1
axiom(noun, law, foundation, basic)
1
basis(noun, law, heart, essential, foundation)
1
imaginings(guesstimate, premise)
1
law(noun, foundation, basic, guesstimate)
1
principle(noun, law, condition, essential, foundation)
1
starting point(expression, guesstimate, premise)
0
apriorism(guesstimate, premise)
0
apriority(guesstimate, premise)
0
assumption(guesstimate, premise)
0
belief(guesstimate, premise)
0
chief ingredient(expression, guesstimate, premise)
0
codification(guesstimate, premise)
0
educated guess(expression, guesstimate, premise)
0
formularization(guesstimate, premise)
0
general truth(expression, guesstimate, premise)
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APASmart Define. (2015). sine qua non thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/sine_qua_non/thesaurus/synonyms
ChicagoSmart Define. 2015. "sine qua non thesaurus" https://smartdefine.org/sine_qua_non/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2015, sine qua non thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/sine_qua_non/thesaurus/synonyms>.
MLASmart Define. "sine qua non thesaurus" 10 April 2015. Web. 30 September 2026. <https://smartdefine.org/sine_qua_non/thesaurus/synonyms>