What does illogically mean?
Illogically means in a way that is contrary to logic or sound reasoning. It is commonly used to criticize an argument, decision, or course of action that reaches a conclusion through faulty reasoning, overlooks relevant evidence, or contradicts its own premises. The word can also describe conduct that seems irrational, though it is usually more precise and more evaluative than simply saying that something is strange or unwise. For example, someone might criticize a plan as illogically devised if it spends more money to solve a problem that a less costly measure could handle effectively. Illogically is the adverbial form of illogical, while the related noun illogic names the condition or quality itself. Because the term carries a strong critical tone, it is most natural in formal analysis, debate, criticism, and explanatory prose.
adverbIn a way that is contrary to logic or sound reasoning. Without logical basis or rational thought.
- In a manner that is contrary to logic or sound reasoning.
- In a manner that lacks rational or sensible justification.
"The argument dismisses contrary evidence and therefore proceeds illogically."
"The witness answered the question illogically, contradicting what she had said moments earlier."
"They chose the more expensive option illogically simply because it carried a more prestigious label."
A conclusion can follow its premises perfectly yet still be illogically framed if the premises assume something false.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does illogically come from?
Illogically derives from illogical, which was formed from the negative prefix il- and logical. Logical comes through French from Latin logicalis, an adjective associated with logic; logic itself derives from Greek logos, meaning “word,” “reason,” or “account.” The same Greek and Latin roots also underlie cognates such as logarithm and logarithmic, while the shared logical vocabulary ultimately reflects the Greek idea of reasoned speech and orderly argument.
Related word forms
How illogically is actually used
The adverb is formal and generally critical: it describes reasoning, conduct, or an argument that conflicts with logic, coherence, or sound judgment. In everyday use, it may imply that something is merely irrational or poorly considered.
Easily confused with illogically
“Illogical” is an adjective describing something contrary to logic, whereas “illogically” is an adverb describing an action or manner performed in that way.