Thought Crime is a type of crime in which the offender's thoughts conflict with or defy the laws or beliefs of the society. Thought police identify this crime through the actions
of the offender either through surveillance of the society or through another individual turning that person in.
Winston also commits the crime of writing in a diary. He kept and wrote in an alcove where the telescreen wasn't able to see what he was doing. In his diary the wrote “DOWN WITH BIG BROTHER” and he knew that rather he wrote it or whether he refrained from writing it, made no difference. He knew that thought police would get him sooner or later. “ Thought police would get him just the same” (Orwell 19).
Citizens in Airstrip one are manipulated in many ways. The Party is filled with psychological stimuli designed to overwhelm the mind’s capacity for independent thought. The giant telescreens that are in every citizen’s room blasts a constant stream of propaganda designed to make the failures of the Party appear to be triumphant successes. The telescreens also monitor their behavior.