indéniablement irrationnel
indéniablement irrationnel
Literally: indéniablement (undeniably) irrationnel (irrational)
In 15 Seconds
- Describes something that is completely and obviously illogical.
- Combines 'undeniably' with 'irrational' for a strong, clear critique.
- Common in debates, venting about policies, or discussing phobias.
Meaning
This phrase describes something that is completely and obviously illogical. You use it when a situation, a decision, or a feeling defies all common sense and nobody can argue otherwise.
Key Examples
3 of 6Talking about a phobia
Ma peur des pigeons est indéniablement irrationnelle, mais je ne peux pas m'en empêcher.
My fear of pigeons is undeniably irrational, but I can't help it.
Discussing a strange law
Cette nouvelle réglementation est indéniablement irrationnelle pour les petits commerçants.
This new regulation is undeniably irrational for small business owners.
Texting a friend about a crush
Je sais que l'aimer est indéniablement irrationnel, il ne me rappelle jamais !
I know loving him is undeniably irrational, he never calls me back!
Cultural Background
The French education system emphasizes 'la dissertation' (the essay), where students are taught to identify and critique irrational arguments using formal language like this. While used in formal writing, Quebecers might use 'c'est pas d'allure' in casual speech to mean the same thing. Belgian French uses this phrase in legal and administrative contexts similarly to France, reflecting the shared Napoleonic legal heritage. In Swiss French, precision is highly valued, and this phrase is common in banking and insurance reports to describe high-risk, illogical behaviors.
Use for emphasis
Use this phrase in the introduction of a French essay to show you have a strong, clear thesis.
Watch the gender
Always check if the thing you are describing is masculine or feminine. It's the most common B2 error.
In 15 Seconds
- Describes something that is completely and obviously illogical.
- Combines 'undeniably' with 'irrational' for a strong, clear critique.
- Common in debates, venting about policies, or discussing phobias.
What It Means
This phrase is the ultimate way to call out nonsense. It combines indéniablement (which means there is no room for doubt) with irrationnel (which means logic has left the building). When you use this, you aren't just saying something is 'weird.' You are stating that it is objectively impossible to justify with reason. It is the verbal equivalent of throwing your hands up in the air because a situation makes zero sense.
How To Use It
You will mostly use this as a descriptive block after a verb like être (to be) or sembler (to seem). Because irrationnel is an adjective, you need to match it to the noun you're talking about. If you're talking about a decision (une décision), it becomes indéniablement irrationnelle. It sounds slightly sophisticated but is very common in both spoken and written French. Think of it as a way to add weight to your observation.
When To Use It
Use it when you’re venting about a bizarre company policy. It’s perfect for describing human emotions, like falling in love with someone who is clearly wrong for you. You can use it in a debate to shut down a weak argument. It also works great when talking about superstitions or phobias. If your friend is afraid of a tiny ladybug, that is indéniablement irrationnel.
When NOT To Use It
Avoid using this for simple mistakes. If someone adds 2+2 and gets 5, they are just wrong, not necessarily irrationnel. Don't use it if you want to be gentle. Calling someone's behavior irrationnel can feel a bit cold or clinical. It’s a strong word, so don't waste it on minor inconveniences like a late bus. Save it for the truly head-scratching moments.
Cultural Background
France is the land of René Descartes and the 'esprit cartésien' (logical mind). In French culture, being logical is a point of pride. Calling something irrationnel is actually a pretty heavy critique in a French context. It implies that the thing or person has failed the basic test of 'bon sens' (common sense). By adding indéniablement, you are saying the lack of logic is so clear that it’s a universal truth.
Common Variations
You might hear totalement irrationnel or complètement absurde. If you want to sound even more intellectual, you could say profondément illogique. In slang, you might just say c'est n'importe quoi, but indéniablement irrationnel gives you that 'intellectual on a terrace' vibe that feels so French.
Usage Notes
This phrase sits in the neutral to formal register. It is highly effective in arguments or when providing an objective critique of a situation. Remember to match the gender and number of 'irrationnel' to the subject.
Use for emphasis
Use this phrase in the introduction of a French essay to show you have a strong, clear thesis.
Watch the gender
Always check if the thing you are describing is masculine or feminine. It's the most common B2 error.
Examples
6Ma peur des pigeons est indéniablement irrationnelle, mais je ne peux pas m'en empêcher.
My fear of pigeons is undeniably irrational, but I can't help it.
Here, it describes a personal feeling that the speaker knows makes no sense.
Cette nouvelle réglementation est indéniablement irrationnelle pour les petits commerçants.
This new regulation is undeniably irrational for small business owners.
A more formal use critiquing a policy or rule.
Je sais que l'aimer est indéniablement irrationnel, il ne me rappelle jamais !
I know loving him is undeniably irrational, he never calls me back!
Using the phrase to describe the 'logic' of the heart.
Payer 15 euros pour une bouteille d'eau ? C'est indéniablement irrationnel.
Paying 15 euros for a bottle of water? That is undeniably irrational.
A common way to complain about something absurdly expensive.
Votre argument repose sur une prémisse qui est indéniablement irrationnelle.
Your argument is based on a premise that is undeniably irrational.
Used to point out a flaw in someone else's logic.
La réaction de la bourse ce matin semble indéniablement irrationnelle.
The stock market's reaction this morning seems undeniably irrational.
Professional context describing unpredictable behavior.
Test Yourself
Complétez la phrase avec la forme correcte de l'adjectif.
Leurs décisions sont indéniablement ___________ (irrationnel).
Le nom 'décisions' est féminin pluriel, mais ici je me suis trompé dans l'option, 'décisions' est féminin, donc 'irrationnelles' est correct. Si c'était 'choix' (masculin pluriel), ce serait 'irrationnels'.
Quelle phrase est la plus appropriée pour un rapport professionnel ?
Comment décrire un investissement qui va faire perdre de l'argent à coup sûr ?
Cette option utilise le registre formel requis pour un rapport professionnel.
Associez le nom à l'adjectif correct.
Noms: 1. Un acte, 2. Une peur, 3. Des propos, 4. Des idées
L'accord se fait en genre et en nombre avec le nom.
🎉 Score: /3
Visual Learning Aids
Practice Bank
3 exercisesLeurs décisions sont indéniablement ___________ (irrationnel).
Le nom 'décisions' est féminin pluriel, mais ici je me suis trompé dans l'option, 'décisions' est féminin, donc 'irrationnelles' est correct. Si c'était 'choix' (masculin pluriel), ce serait 'irrationnels'.
Comment décrire un investissement qui va faire perdre de l'argent à coup sûr ?
Cette option utilise le registre formel requis pour un rapport professionnel.
Match each item on the left with its pair on the right:
L'accord se fait en genre et en nombre avec le nom.
🎉 Score: /3
Frequently Asked Questions
3 questionsNot at all! French speakers love long adverbs ending in -ment. It adds a rhythmic, intellectual quality to your speech.
Yes, but it's very harsh. It's better to say 'Ton comportement est...' to critique the action rather than the person.
'Irrationnel' is about a lack of logic; 'déraisonnable' is about a lack of moderation or good sense (like a price being too high).
Related Phrases
totalement absurde
similarcompletely absurd
manifestement illogique
synonymobviously illogical
parfaitement raisonnable
contrastperfectly reasonable
contre-intuitif
specialized formcounter-intuitive
