Besides, she already has a confirmed diagnosis of bipolar disorder, and manic delusions would easily create the beliefs and behaviors Susan exhibits, no schizophrenia required. I'm not sure why Susan's delusions seem so consistent, however--while her actions and outreach seem to come in manic waves, as far as I can tell she always remains firmly convinced of her children's schizophrenia, even when not "manic." Do any Kiwis with deeper medical knowledge know if bipolar delusions can persist like this?