Another paper on schizophrenia and communication

Another random open access find. I've been looking for another
explanation of the word "ostensive" (in the psychiatric
sense) other than the explanation I read in a BJPsych paper on the
difference between a mental illness and a personality disorder.

Understanding Minds and Understanding Communicated Meanings in
Schizophrenia
http://philrsss.anu.edu.au/~mdavies/papers/pragmatics.pdf
<http://philrsss.anu.edu.au/%7Emdavies/papers/pragmatics.pdf>

I can't remember if the distinction is solely on a biological basis,
i.e. all 'true' mental illnesses have biological cause- this is known as
Kraepelinian ostensivity. There's another aspect apart from the
biological cause and I can't remember if it's aetiology (which wouldn't
make sense) or prognosis (which would).

I find seeing two versions of a definition interesting. It presents a
fuller picture. I find some ways people express definitions easier to
understand than others so seeing two or three helps me understand better.