Plato believes that the art of argumentation is both naturally given and must be practiced. In reference to learning and arranging arguments, he writes, “Until a man knows the truth of the several particulars of which he is writing or speaking, and is able to define them as they are, and having defined them again to divide them until they can be no longer divided, and until in like manner he is able to discern the nature of the soul, and discover the different modes of discourse which are adapted to different natures, and to arrange and dispose them in such a way that the simple form of speech may be addressed to the simpler nature, and the complex and composite to the more complex nature-until he has accomplished all this, he will be unable to handle arguments according to rules of art, as far as their nature allows them to be subjected to art, either for the purpose of teaching or persuading;-such is the view which is implied in the whole preceding argument.”
He suggests that rhetoric is the art of deception, as a strong speaker count prove one thing true and then turn around to prove the other thing true. Instead, “to all of them we are to say that if their compositions are based on knowledge of the truth, and they can defend or prove them, when they are put to the test, by spoken arguments, which leave their writings poor in comparison of them, then they are to be called, not only poets, orators, legislators, but are worthy of a higher name, befitting the serious pursuit of their life.” This name is “lovers of wisdom or philosophers.” He writes that one “will not be satisfied with rhetoric…for he has an element of philosophy in his nature.”
As can be seen in the previous quotation, he also distrusts writing. This is because writing hinders memory and because writing cannot respond to the reader. He argues that writing “will create forgetfulness in the learners' souls, because they will not use their memories; they will trust to the external written characters and not remember of themselves. The specific which you have discovered is an aid not to memory, but to reminiscence, and you give your disciples not truth, but only the semblance of truth; they will be hearers of many things and will have learned nothing.” He also maintains, “You would imagine that they had intelligence, but if you want to know anything and put a question to one of them, the speaker always gives one unvarying answer. And when they have been once written down they are tumbled about anywhere among those who may or may not understand them, and know not to whom they should reply, to whom not: and, if they are maltreated or abused, they have no parent to protect them; and they cannot protect or defend themselves.”