A weakness of localisation theory?

-Some supporting evidence comes from case studies -Unique cases of neurological damage support localisation theory eg: Phinea Gage who lost some of his brain in an explosion and his personality changed -However, there is difficulty to make meaningful generlisations based on a single individual and conclusions may depend on the subjective interpretation of the researcher. -Suggests that some evidnece supporting localisation may lack validity, oversimplyfiying brain process and undermining the theory