Body-to-body communication receiving the communication. Because this way of communicating is so varied and has so many ways of being expressed, some meanings can become lost or misunderstood. It can become difficult to focus on the message being conveyed if more than one gesture is being expressed at the same time and some signals can be missed if one is focusing on another at the same time, causing confusion in the message. This type of communication also makes it difficult to change subjects or to go into detail about a subject without the use of verbal indication. Body-to-body communication is only helpful
Programming language from most other forms of human expression in that they require a greater degree of precision and completeness. When using a natural language to communicate with other people, human authors and speakers can be ambiguous and make small errors, and still expect their intent to be understood. However, figuratively speaking, computers "do exactly what they are told to do", and cannot "understand" what code the programmer intended to write. The combination of the language definition, a program, and the program's inputs must fully specify the external behavior that occurs when the program is executed, within the domain of control of