Question: In the course of a patient's interview, you realize that you are not understanding what the patient is saying. He decides to focus his attention on the discourse and realizes that he does not have a guiding idea even though specific fragments of it are understandable. This alteration of the thinking language, typical of schizophrenia on the other hand, is what in psychopathology is known as: 
 Options:  <1> Dissociation of thought. <2> Fugue of ideas. <3> Persistent language. <4> Disorganization of thought. <5> Blocking of thought.
4