This paper argues for the following. a. The natural language system is a disguised virus-check system. It self-organized in the brain of the human ancestor as the result of a self-organizing mutation that took place about two million years ago. b. The language system generates information that is discrete and infinite. Discrete infinity is an indication that the language system has become cancerous. The language system disguised itself as an immune system. The brain is a typical immune system. c. The evidence for the disguise exists in the natural language computation. d. The structural inf...