The belief that one is always right and an unwillingness to consider alternative viewpoints can be associated with various personality traits and disorders. One of the most relevant personality traits related to this behavior is called "grandiosity," which is often seen in narcissistic personality disorder (NPD).
Narcissistic Personality Disorder (NPD) is a mental disorder characterized by a pervasive pattern of grandiosity, a need for admiration, and a lack of empathy for others. People with NPD often have an inflated sense of their own importance and believe they are special, unique, or superior to others. They may also have an exaggerated sense of their achievements and talents. Consequently, they tend to dismiss or belittle the opinions and feelings of others and have difficulty acknowledging their own mistakes or shortcomings.
It's important to note that not everyone who displays an occasional sense of certainty or self-assuredness is suffering from a mental disorder. The key characteristic of NPD is the pervasive and inflexible pattern of grandiosity that causes significant distress or impairment in various areas of life.
If you suspect that someone you know may be experiencing personality-related issues or mental health concerns, it is essential to encourage them to seek professional help from a mental health specialist. Only a qualified professional can provide an accurate diagnosis and develop an appropriate treatment plan, if necessary.