The boundaries of normality in physiology are often blurred. This tells us something about the continuity of human experience, but does this imply blurring into pathology?
Just because we are able to show continuity of experience within the population—for example, some people under some circumstances perceive voices or experience a self-referential thought—does not mean there is no genuine and marked discontinuation that marks the onset of pathology. Thinking about being able to fly, believing one is able to fly, and then trying to fly might well be perceived as being part of the continuity of experience, but the demarcations, in terms of pathology, between them are clear.