Philip Jose Farmer is/was a real mixed bag. He was 'creative', but he bit off more then he could chew as he developed Ringworld.
   Some absolutely amazing ideas taken to conceptual incoherence.
I know.. 'de gustibus non disputandem est', and YMMV. I am reminded of the philosophical logical fallacy "ex falso [sequitur] quodlibet, 'from falsehood, anything [follows]"
   In Farmer's case, it suggests that the very 'creative' aspects of his ideas led to such hard-to-follow story lines that they seem to just be whims that he expanded like improvised jazz, but with far less rules.
   I suspect that his mind was a strange place to contemplate, and this is borne out by his stories such as "Strange Relations" and novels like "Blown". http://www.pjfarmer.com/WORKS-books-blown.html
I am NOT advocating censorship, but merely noting that much of his stories don't seem to "me" to fit what *I* call science-fiction. I am not alone in that feeling.