410 FALLACIES. 



previously known; but the mode in which the last 

 motion produces the sensation of colour, cannot be 

 explained by any law of motion ; it is the law of 

 colour; which is, and must always remain a peculiar 

 thing. Where our consciousness recognises between 

 two phenomena an inherent distinction ; where we are 

 sensible of a difference which is not merely of degree, 

 and feel that no adding one of the phenomena to 

 itself would produce the other; any theory which 

 attempts to bring either under the laws of the other 

 must be false; though a theory which merely treats 

 the one as a cause or condition of the other, may 

 possibly be true. 



4, Among the remaining forms of erroneous 

 generalization,, several of those most worthy of and 

 most requiring notice have fallen under our examina- 

 tion in former places, where, in investigating the rules 

 of correct induction, we have had occasion to advert 

 to the distinction between it and some common mode 

 of the incorrect. In this number is what I have for- 

 merly called the natural Induction of uninquiring 

 minds, the Induction of the ancients, which proceeds 

 per enumerationem simplicem : (f This, that, and the 

 other A are B, I cannot think of any A which is not 

 B, therefore every A is B." As a final condemnation 

 of this rude and slovenly mode of generalization, I 

 will quote Bacon's emphatic denunciation of it ; the 

 most important part, as I have more than once ven- 

 tured to assert, of the permanent service rendered by 

 him to philosophy. " Inductio quse procedit per enu- 

 merationem simplicem, res puerilis est, et precario 

 concludit," (concludes only by your leave, or provi- 

 sionally,) " et periculo exponitur ab instantia contra- 

 dictoria, et plerumque secundum pauciora quam par 



