12
logical(adjective, reasonable, obscure, probable)
8
reasonable
6
clever
6
rational(adjective, right, careless, stupid)
5
realistic
5
sensible
5
reasoned
5
sound(adjective, reasonable, logical)
5
well-presented
4
coherent
4
commonsense
4
consistent
4
correct(adjective, right)
4
discursive
4
formal
4
sober
4
valid
4
well-founded
4
well-grounded
3
dianoetic
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APASmart Define. (2015). illogical thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/illogical/thesaurus/antonyms
ChicagoSmart Define. 2015. "illogical thesaurus" https://smartdefine.org/illogical/thesaurus/antonyms (accessed September 23, 2026).
HarvardSmart Define 2015, illogical thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/illogical/thesaurus/antonyms>.
MLASmart Define. "illogical thesaurus" 13 April 2015. Web. 23 September 2026. <https://smartdefine.org/illogical/thesaurus/antonyms>