ABSTRACT
W e are now in position to affirm that the rhetorical study of an argument begins with a study of the sources. But since almost any extended argument will draw upon more than one source we must look, to answer the inquiry we are now starting, at the prevailing source, or the source which is most frequently called upon in the total persuasive effort. We shall say that this predominating source gives to the argument an aspect, and our present question is, what can be inferred from the aspect of any argument or body of arguments about the philosophy of its maker? All men argue alike when they argue validly because the modes of inference are formulas, from which deviation is error. Therefore we characterize inference only as valid or invalid. But the reasoner reveals his philosophical position by the source of argu ment which appears most often in his major premise because the major premise tells us how he is thinking about the world. In other words, the rhetorical content of the major premise which the speaker habitually uses is the key to his primary view of existence. We are of course excluding artful choices which have in view only ad hoc persuasions. Putting the mat ter now figuratively, we may say that no man escapes being branded by the premise that he regards as most efficacious in an argument. The general importance of this is that major premises, in addition to their logical function as part of a de
ductive argument, are expressive of values, and a character istic major premise characterizes the user.
