Aristotle does, indeed, distinguish between (i) logic as the theory or method of arriving at true conclusions; and (ii) dialectic as the method of arriving at conclusions that are accepted —conclusions in regard to which it is not taken for granted that they are false and also not taken for granted that they are true in themselves. What is this but the art of being in the right, whether one has any reason for being so or not, in other words, the art of attaining the appearance of truth, regardless of its substance?
Aristotle divides all conclusions into logical and dialectical, in the manner described, and then into eristical. (iii) eristic is the method by which the form of the conclusion is correct, but the premises (the materials from which it is drawn) are not true, but only appear to be true. Finally (iv) sophistic is the method in which the form of the conclusion is false, although it seems correct.