Someone who always thinks they are right might be described as a know-it-all, dogmatic, opinionated, self-righteous, inflexible, or overconfident. These words differ: some describe certainty, some unwillingness to listen, and others a superior attitude.
Choose the Word for “Someone Who Thinks They Are Always Right” Carefully
- Acts as though they know everything: Know-it-all
- Treats beliefs as unquestionably correct: Dogmatic
- Strongly expresses views: Opinionated
- Assumes moral superiority: Self-righteous
Know-it-all
An informal noun for someone who behaves as though they know more than everyone else.
Example: “He can sound like a know-it-all when he corrects people on minor details.”
Dogmatic
Describes someone who presents beliefs or opinions as unquestionably true and resists alternatives.
Example: “Her dogmatic approach left little room for discussion.”
Opinionated
Someone with strong opinions who expresses them readily. It does not necessarily mean they think they are always right.
Example: “He’s opinionated, but he’s usually willing to hear another view.”
Self-righteous
Suggests certainty that one’s own behavior, values, or opinions are morally superior.
Example: “The self-righteous tone made the criticism harder to accept.”
Inflexible
Best when the problem is unwillingness to adapt or consider alternatives.
Example: “The manager was inflexible even when the new evidence was presented.”
Overconfident
Focuses on excessive confidence in one’s judgment or ability, which may lead to dismissing correction.
Example: “She was overconfident about the estimate and ignored several warnings.”
Arrogant
Stronger and broader, implying an exaggerated sense of superiority.
Example: “His arrogant response suggested he did not think anyone else’s view mattered.”
Closed-minded
Describes unwillingness to consider new ideas, arguments, or evidence.
Example: “It is difficult to have a productive debate with someone who is closed-minded.”
Argumentative
Someone who frequently disputes or challenges others; they may not literally believe they are always right.
Example: “He gets argumentative whenever anyone questions his assumptions.”
Uncompromising
Can be neutral or negative. It means unwilling to make concessions or adjust a position.
Example: “Her uncompromising stance made agreement impossible.”
Certain of themselves
A neutral phrase when you want to describe confidence without necessarily criticizing it.
Example: “He is very certain of himself, even when the issue is complicated.”
Never admits they’re wrong
A plain descriptive phrase that may be more accurate than attaching a personality label.
Example: “The frustrating part is that she never admits she’s wrong, even after the facts are clear.”
Opinionated Does Not Mean Always Wrong
An opinionated person has and expresses strong views. They may still listen, revise their opinion, and sometimes be correct. Use stronger terms only when the behavior warrants them.
Describe the Pattern, Not a Diagnosis
If you are discussing a real person, observable wording such as “they dismiss other viewpoints” is often clearer than speculative psychological labels.