viii PREFACE 



quiry, modern writers on logic are inclined to discuss many 

 problems which would find a more appropriate place in 

 works on epistemology or ontology. Such problems are 

 but briefly referred to in the present work. But it has 

 been thought advisable to follow the now common prac 

 tice by dwelling at greater length upon the presuppositions 

 of induction, because the theory of induction has not 

 yet secured from Scholastic writers the amount of atten 

 tion its growing importance would seem to demand. 



The standpoint of the present work is that of Scholas 

 ticism as conceived and expounded by those who represent 

 the neo-scholastic movement in modern philosophy. To 

 all such the conviction is common that no recent system 

 of philosophy contains a body of doctrines more in keeping 

 with the established truths of science than are the doctrines 

 of Scholasticism. But to know what the established truths 

 of science are, we must understand the methods of science. 

 Hence the special claims of induction on the attention of 

 the Scholastic logician. 



Philosophers who believe in the superiority of the 

 Scholastic system, as compared with other systems now 

 actually in vogue, recognize the need of applying the 

 traditional principles of this system to modern conditions 

 and problems. Many of the latter are new, at least in 

 form ; and much light has been thrown upon them by the 

 intellectual labours of non-scholastic writers. Such useful 

 achievements the modern Scholastic will gratefully recog 

 nize and gladly welcome ; while at the same time he 

 remains true to the truth that is in Scholasticism (reject 

 ing whatever he finds to be indefensible in it), and com 

 bats the teachings opposed to it. 2 Vetera novis aiigere 



1 For history and bibliography of this school of thought, Professor de Wulfs 

 Scholasticism Old and New (Dublin, Gill, 2nd edit., 1910), and Perrier s Revival of 

 Scholastic Philosophy (Columbia University Press, 1909), may be consulted with 

 advantage ; also the Louvain Cours de Philosophif and the Stonyhurst Philosophical 

 Series. 



2 &quot; Nos igitur, dum edicimus, libenti gratoque animo excipiendum esse quidquid 

 sapienter dictum, quidquid utiliter fuerit a quopiam inventum atque excogitatum ; 



