In psychology,<unk>  (Greek α-, “without”, and λόγος, “speech”), or poverty of speech, is a general lack of additional, unprompted content seen in normal speech.  As a symptom, it is commonly seen in patients suffering from schizophrenia.  It can complicate psychotherapy severely because of the considerable difficulty in holding a fluent conversation.
People can revert to<unk>  as a way of reverse psychology, or avoiding questions.
Q: Do you have any children?
A: Yes.
Q: How many?
A: Two.
Q: How old are they?
A: Six and sixteen.
Q: Are they boys or girls?
A: One is a boy, the other is a girl.
Q: Who is the sixteen year old?
A: The boy.
Q: What is his name?
A: Edmond.
Q: And the girl's?
A: Alice.
Q: Do you have any children?
A: Yes, a boy and a girl.
Q: How old are they?
A: Edmond is sixteen and Alice is six.
Alogia
Pellagra
Soteria
Koilonychia
Pyromania
Sterculia
Black piedra
Melanonychia