A Confederacy of Dunces question

I live in New Orleans, at all the ladies at the Symphony Book Fair were crazy about this book when it came out. I eventually read it, and carefully examined it in rereading it. Certainly an unpleasant character is Ignatius Reilly. Later a got to know someone who actually knew Ken Toole very well. She hated the book, but what she said was interesting. Ignatius Reilly IS Ken Toole. Toole, or whoever wrote the book, simply used Toole as an exact copy. there was a "real" Myrna Minkoff(Baptist, not Jewish, who hung around with Ken Toole when they both went to Tulane."Two insane minds finding each other" as my friend said. "Myrna"disrupted classes, was in and out of insane asylums all of her life(she died in the state institution for the terminally insane at Jackson, La. in 2008). She was not a nympho, but thought that every man she passed on the street was in love with her! Ken Toole, like his alter ego, filled notebooks with rambling invective. My friend had a chance to read part of one "Stream of consciousness of a deranged mind" as she put it. She met Toole's mother, the very image of Reilly's mother. Reilly's" philosophy" in the book was basically the same as one of his teacher's at Tulane, and Talc was copied after another.
The problem is, how could such a screwball put together something as coherent and well organized as this book? My friend agreed that he couldn't have. Either it was completely rewritten by someone else from Toole's disjointed ramblings, or it was completely fabricated by someone who knew Toole and his mother very well. As my friend said, if people had gotten to see the real Ken Toole,instead of the "unappreciated genius" he has been depicted to be, they would have a totally different opinion.