The term "unsoundness of mind" refers to a person's inability to think rationally or logically due to mental illness or impairment. Synonyms for this term include mental incapacity, cognitive impairment, psychological disorder, psychiatric condition, and insanity. "Mental incapacity" is a broad term that encompasses a range of cognitive disabilities and disorders, such as dementia or developmental disabilities. "Cognitive impairment" refers specifically to a decrease in mental ability, including memory loss or difficulty with decision-making. "Psychological disorder" encompasses a wide range of mental health conditions, from anxiety and depression to personality disorders and psychotic disorders. "Psychiatric condition" refers to any mental disorder that is recognized by medical professionals. The term "insanity" is often used colloquially to describe severe mental illness or irrational behavior.