illogically

In nonsensical fashion

Illogically means in a way that violates logic or sound reasoning.

Someone who argues illogically draws conclusions that don't follow from their premises: She illogically assumed that because he was quiet, he must be angry.

The word often signals that someone's thinking has gone astray, though what seems illogical may simply follow unfamiliar reasoning.

irrational

unreasonably

Beyond logical limits

absurdly · baselessly · groundlessly · arbitrarily · capriciously · whimsically · indefensibly · unjustifiably · thoughtlessly · recklessly

incoherent

inconsistently

In an unreliable manner

disjointedly · confusedly · incomprehensibly · erratically · chaotically · nonsensically · unintelligibly · bewilderingly · haphazardly

fallacious

non sequitur

Illogical conclusion or remark

slippery slope · straw man · red herring · begging the question · post hoc · equivocation · sophistry · specious · spurious · unsound

absurd

preposterously

In a ridiculous manner

bizarrely · outlandishly · paradoxically · surreally · grotesquely · comically · laughably · eccentrically · quixotically · zanily

Opposites
logical reasoning

illogicallylogically

Through sound reasoning

rationally · validly · coherently · consistently · analytically

coherence and consistency

illogicallycoherently

In connected, sensible manner

consistently · sensibly · intelligibly · cogently · lucidly

rationality

illogicallyrationally

In a logical manner

reasonably · sensibly · judiciously · level-headedly · pragmatically

Phrases
Family

illogical, illogicality, illogicalness

Familiarity
Top 200,000
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Used worldwide · Timeless · Abstract · Everyday, not technical · Rated G