The level of subject matter knowledge and argumentative ability an individual involved in an argument possesses determine rationality. Finally, the rational world paradigm presupposes that the world is composed of logical puzzles that human beings solve through rational analysis. As can be seen both paradigms offer highly differing presuppositions over what constitutes human beings and how they communicate among one another.
Although Fisher has not explicitly mentioned it, the conduit metaphor can be said to share certain similarities with the rational world paradigm. The conduit metaphor stresses that thoughts and feelings are transferred via language between individuals. This entails that senders of information put their thoughts and feelings into words, which have to then be extracted out by receivers using objective interpretation (Reddy, 1979).
The metaphor's assumption that receivers will be objective while interpreting the message is similar to the rational world paradigm's assumption that individuals will objectively examine how well an argument was presented in terms of knowledge and ability before coming to understand its rationality. The metaphor makes it conditional for senders of information to make sure their messages contain the intentional meaning behind them; any unintentional meanings are considered to be exceptions that occurred through the fault of the sender (Axley, 1984).
Likewise the rational world paradigm makes it conditional upon communicators to make sure their argument is clear by conducting it according to the speaking situation one is involved in. Due to similarities such as these, it can be understood that both presuppose that humans are essentially rational beings who communicate clearly and effectively with each other due to their objective nature.
Fisher compares and contrasts the narrative paradigm with the rational world paradigm (which by extension can be applied to the conduit metaphor) in the following way. He notes that the rational world paradigm assumes that humans have to be educated into understanding any form of communication from a rational perspective. This means that they have to be taught not only about the subject matters their arguments are based upon but also about the ways one can make proper arguments. According to Fisher this means that the rational world paradigm requires that only well-educated and qualified individuals of society be involved in this endeavor.
The audience, which means here the rest of society, has to be educated and qualified enough to understand what the experts have to say about certain matters. Thus the rational world paradigm calls for certain members of society to become experts in the various fields of knowledge available so that only they can act as communicators of information. This assumption can apply to the conduit metaphor, in that the experts can be thought of as the communicators of information and the rest of society is the audience to whom this information is sent towards. Communicators have to use their knowledge and expertise towards finding the right words to put the information in and the audience has to knowledgeable enough to objectively interpret what the information is about.
Fisher contrasts this assumption with the one made by the narrative paradigm, which assumes all humans possess the ability to form stories about their lives, which they would refer to constantly when communicating with others. This means that unlike the rational world perspective, which requires that humans have to learn how to communicate properly, the narrative perspective states that all humans are already born with the ability to communicate. Thus, the narrative perspective does not require that only experts can act as communicators of information. The audience, according to the narrative perspective, can be any member of society who has the ability to understand the information according to the logic of good reasons. Using this logic means that based upon reasons, which are determined by the history, biography, culture, and character of the audience, receivers of information can interpret the information according to what they believe it is.
This is unlike the way the rational world perspective requires that the audience has to understand the information based only on rationality, which is determined by the level of knowledge that they possess, and that they have to interpret the information only one way, which is the way intended by communicators. According to this then, the narrative paradigm can be deemed as being the more human approach towards communication, because it entails that all humans are capable of communicating despite the level of knowledge they possess. The rational world paradigm, or by extension the conduit metaphor, is more of a mechanistic approach that is best suited for communications...
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