Language plays an important role in human communication. If a language is completely effective, then every possible combination of its basic language can express words that have independent meaning and understandability. However, if human hearing There is a problem with the system's ability to receive sound signals, so not every possible combination of basic languages can become an independent and understandable word. visible? ["If the human auditory system's function of receiving sound signals is normal, then every possible combination of the basic language of a language can become an independent and understandable word.", 'The validity of language leads to the practicality of human communication.', 'If every possible combination of the basic language can become an independent and understandable word, the language is completely effective.', "If there is a problem with the human auditory system's ability to receive sound signals, then language cannot be completely effective."]