Final answer:
The term for a positive symptom of schizophrenia where individuals hold fixed beliefs that are not amendable to change in light of conflicting evidence is delusion.
Step-by-step explanation:
The term for a positive symptom of schizophrenia where individuals hold fixed beliefs that are not amendable to change in light of conflicting evidence is delusion. Delusions are false beliefs that are typically bizarre or unrealistic, such as believing that one can fly or possess superhuman strength. These beliefs persist despite evidence to the contrary and are a hallmark feature of schizophrenia.