Synonyms of illogical

illogical

adjective

(ˌ)i(l)-ˈlä-ji-kəl 

as in unreasonable

not using or following good reasoning

the illogical claim that playing basketball makes people taller because one sees so many tall players

illogical people are likely to believe every sensational claim made on TV

Synonyms & Similar Words

• unreasonable
• irrational
• unreasoning
• illegitimate
• misleading
• absurd
• unreasoned
• weak
• foolish
• silly
• fallacious
• invalid
• nonrational
• unsound
• inconsequential
• weird
• meaningless
• inconsequent
• inconsistent
• unusual
• odd
• strange
• specious
• misguided
• nonsensical
• sophistic
• asinine
• insane
• random
• surreal
• preposterous
• unconsidered
• inexplicable
• ill-advised
• disorganized
• wacky
• unconvincing
• eristic
• mad
• unexplainable
• disordered
• senseless
• unaccountable
• half-baked
• nutty
• reasonless
• peculiar
• rambling
• Kafkaesque

Antonyms & Near Antonyms

• logical
• reasonable
• rational
• valid
• sound
• sensible
• wise
• sane
• justified
• reasoned
• sober
• enlightened
• just
• plausible
• well-founded
• informed
• well-grounded
• compelling
• commonsense
• clear
• certain
• solid
• persuasive
• credible
• organized
• true
• convincing
• satisfying
• sure
• cogent
• ordered
• demonstrated
• confirmed
• established
• substantiated
• validated
• corroborated

Example Sentences

Recent Examples of illogical

As presented in the Gang’s illogical scapegoating, fear-mongering, and overall manipulative self-exoneration, the debate turned into a farce. — Dennis Perkins, Entertainment Weekly, 28 July 2026

For instance, a sleep issue prompt yields varied advice depending on prior conversational context, occasionally making illogical leaps. — Lance Eliot, Forbes.com, 26 July 2026

Their complaints have been mostly incoherent and illogical, with UEFA's statement in particular being laughably inaccurate. — Ian Miller Outkick, FOXNews.com, 7 July 2026

He’s made his way into the backrooms and finds that the place keeps going, offering up illogical doorways and holes in the floor. — Alison Willmore, Vulture, 29 May 2026