Dr. Liam Mac Gabhann:

It is a terrible thing, but people will lie. The therapy team, therefore, is responding to what it perceives as one diagnosis. The mental health service is treating a person based on a lie. If that lie fragments, which it inevitably will, the person will be chucked out of the mental health service because they are not being compliant with that service. The lie means that the person will not also have their whole person responded to.