Ferdinand de Saussure explains speech communication using the ‘speech circuit’. According to him, between two persons A and B, speech communication can be achieved successfully as if A’s thought were transferred from A to B or vice versa. But Saussure’s ‘speech circuit’ is challenged by Tokieda, Harris, and Moore and Carling, who all have an idea in common that words do not have meanings. Words can be compared to a ‘water pipe,’ ‘money’ or a ‘catalyst’ for communication. For them, words are just ‘media’ used in communication, but not entities that have their own inherent meanings.