Since diagnoses merely represent what a doctor is thinking, how can a mental patient know the difference between de facto reality and what decisions a doctor is planning?We know planning is not real but a mental patient can't say that a decision from a doctor is not reality, even though a decision from a doctor is not anything that has a physical existence.So if the doctor decides a 5150 or likewise, I'm not asking about the legal processes but how you could convince that a diagnosis is not just a model. What is a mutual indicator for every sz or psychosis? IF there is no common indicator, how can it be a diagnosis or a condition? What is absolutely impossible with e.g. schizophrenia that is possible with no schizophrenia?Since paranoid schizophrenia could be just a person who is worried, which doesn't exclude anything does it. 
How to tell a diagnosis from an actual state?
abnormal psychology;cognitive modeling;psychiatry;schizophrenia;psychosis