One common symptom of psychosis is:

Delusional beliefs about reality are indeed a common symptom of psychosis. Psychosis typically involves a disconnection from reality, which can manifest in various ways, including hallucinations (seeing or hearing things that are not there) and delusions (strongly held false beliefs that are inconsistent with reality). Individuals experiencing psychosis may firmly believe in things that don't reflect the actual circumstances, such as thinking they possess special powers or that others are conspiring against them. These delusional beliefs can significantly impair functioning and affect an individual's ability to engage with others or understand their environment.

In contrast, recognizing harmful thoughts is more associated with cognitive awareness, which is not characteristic of psychosis. Feelings of intense sadness are often related to mood disorders, such as depression, rather than psychosis itself. Avoidance of social situations usually stems from anxiety or social phobias, rather than the hallmark symptoms of psychosis. Understanding these distinctions can help in identifying and treating various mental health conditions more effectively.