ABSTRACT
In this chapter we explore the borderline territory between neurosis and psychosis, sanity and insanity. We see how to define a ‘functional psychosis’; having got our theoretical definition we find what problems we have in practice in being sure that a given patient is psychotic. On the one hand we learn about the hallucinations that normal people have, and on the other we look at the patients who have no delusions or hallucinations but who are psychotic. We distinguish between symptoms and signs.
