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the totality of ideas and concepts not corresponding to reality, distorting reality, and not lending themselves to correction. Delirium completely takes possession of the consciousness and is characterized by the destruction of logical thinking. It is a symptom of many mental illnesses (for example, schizophrenia and alcoholism).
There are two varieties of delirium. In so-called primary delirium, rational, logical cognition is affected; distorted judgment is consistently reinforced by a series of subjective proofs having their own system. This type of delirium is persistent and has a tendency to be progressive. “Emotional” delirium is characterized by images, primarily day-dreams and fantasies; ideas are fragmentary and inconsistent; and rational and emotional cognition are disturbed. Delirium can be eliminated when the underlying illness is cured.
clouding of consciousness that generally occurs at the height of an infectious disease and is accompanied by a flood of vivid visual hallucinations, raving, and motor excitation. Delirium provoked by alcohol is called delirium tremens.
["Parallel Programming with Coordination Structures", S. Lucco et al, 18th POPL, pp.197-208 (1991)].