Which term refers to a fixed, false belief that is resistant to reason or confrontation?

The term that refers to a fixed, false belief that is resistant to reason or confrontation is delusion. Delusions are characterized by strong convictions that do not change even when presented with contradictory evidence. They are a common symptom in various mental health disorders, particularly in psychotic disorders such as schizophrenia and delusional disorder.

Delusions can significantly impact a person's perception of reality, leading them to hold beliefs that are not based on actual experiences or facts. For example, an individual may believe they are being persecuted or that they possess extraordinary abilities, despite clear evidence to the contrary. This unwavering adherence to false beliefs is what defines a delusion.

In contrast, hallucinations involve perceiving something that is not present, such as hearing voices or seeing things that do not exist. Phobias are irrational fears of specific objects or situations, while compulsions refer to repetitive behaviors or mental acts performed to reduce anxiety related to obsessive thoughts. Each of these terms describes different mental health phenomena that do not align with the definition of a delusion.