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

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

In spite of D'Arcy's best efforts, Rhaenyra is an impenetrable character with illogical choices and zero magnetism to the viewers (or seemingly, her councilors). — Kelly Lawler, USA Today, 21 June 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

Many professional teams pretzel themselves into illogical positions when putting and keeping players on their rosters. — Troy Renck, Denver Post, 19 May 2026