Tell a schizophrenic they are lying?

Paraprax...since you ask...we have been close neighbours now for 8 years. I've heard and seen a few wild stunts she does but I was always very busy. Other days I saw she was hunched in front of her mothers garage not moving for a day at a time. A few days ago she came over and decided to be social. I had some time so I shared a coffee with her. She started talking and did not shut up for 5 hours no matter how I moved or what I did. I know zip nada zero zilch about schizophrenia which apparently according to other neighbours she has. Her stories of fame and self importance was insane. It was hard not to laugh. Not because I am rude, have no morals or wish to present myself as being as *ss. It was funny, in a strange way. I refrained but came here to see if someone could offer me a little understanding of what schizophrenia really is. I have read the internet versions and it seems to describe her well. I was hoping for a new angle to consider. She will likely be back again...she'