Earlier quoted context omitted.
Lack of insight to varying degrees is a well-known feature, but not always the case. Having insight doesn't imply at all a lack of symptoms. It's possible to be aware, but not be able to correct errors in real time. Someone with paranoia is highly sensitive to coincidences, and may have great difficulty blocking out elaborate theories regarding them which seem to spontaneously arise, as well as an intense fear reacti…
I have always wondered why if someone with good logical reasoning skills got schizophrenia they clould not reason their way to seeing their delusions for what they are. For example (real example I heard) if I think everyone who looks at my eyes is from the government and tracking me on my walk to the park- there simply is no agency that could field and coordinate that many undercover agents nor surreptitiously replac…
It's entirely possible that a person can reason like that and reject some theories, and it may even be comforting to see and feel things that are easily dismissed.
However, paranoia does not necessarily involve things that are so clearly absurd, even to a healthy observer. You're talking about one end of a distribution, even for a given person, and an almost infinite number of possibilities are in a gray area.
It's possible to observe patterns of coincidence without a particular theory, and rejecting a theory or switching to a different one doesn't make observations go away.
Those observations can be mistaken or selective, but that's a separate issue.