CONTENTS. 

 CHAPTER VI. Fallacies of Ratiocination. 



PAGE 



1. Introductory remarks .... 432 



2. Fallacies in the conversion and sequipollency of propositions 432 



3. Fallacies in the syllogistic process . . . 434 



4. Fallacy of changing the premisses . . . 435 



CHAPTER VII. Fallacies of Confusion. 



1. Fallacy of Ambiguous Terms . . . 440 



2. Fallacy of Petitio Principii . . . 457 



3. Fallacy of Ignoratio Elenchi . . . 467 



BOOK VI. 



ON THE LOGIC OF THE MORAL SCIENCES. 

 CHAPTER I. Introductory Remarks. 



1. The backward state of the Moral Sciences can only be 

 remedied by applying to them the methods of Physical 

 Science, duly extended and generalized . . 475 



2. How far this can be attempted in the present work . 477 



CHAPTER II. Of Liberty and Necessity. 



1. Are human actions subject to the law of causality ? . 4/9 



2. The doctrine commonly called Philosophical Necessity, in 



what sense true ..... 480 



3. Inappropriateness and pernicious effect of the term Necessity 483 



4. A motive not always the anticipation of a pleasure or a 



pain . .... 487 



CHAPTER III. That there is, or may be, a Science of 

 Human Nature. 



1. There may be sciences which are not exact sciences . 490 



2. To what scientific type the Science of Human Nature cor- 

 responds . . . .493 



CHAPTER IV. Of the Laws of Mind. 



1. What is meant by Laws of Mind? . . . 497 



2. Is there a science of Psychology? . 493 



