Reassuringly, this is the description of schizophrenia on the (Australian) Schizophrenia Research Institute.
We can only hope that the full range of mental health professionals who believe that this syndrome exists as a “real” illness read this”
“Schizophrenia is a syndrome, a collection of symptoms and signs that go together and continue over time. It is not a single disease entity like diabetes, lung cancer or tuberculosis. It very likely represents a group of psychiatric conditions that, at present, cannot be clearly distinguished from each other and appear to overlap with other psychiatric conditions and with normality. In other words, it has “fuzzy boundaries” which make it very difficult to define and study. While we sometimes speak of schizophrenia as if it were a clearly defined disease, it is important to remember that this is not the case and that we are merely using a convenient short-hand language.” (emphasis added)