304 THE SCIENCE OF LOGIC 



He makes it mean not &quot; that what qualifies an attribute qualifies the subject 

 of it,&quot; but &quot;that what indicates the presence of an attribute indicates what 

 the latter indicates &quot; l : whatever [] is a mark of any mark \_M~\, is a mark 

 of that [P] which this last [J/] is a mark of ; whatever [/*] is repugnant 

 with a mark [Af] is repugnant with that [S] which this last \_M&quot;\ is a mark 

 of. If we bear in mind that an attribute may be a mark of the absence of 

 other attributes, we may combine both parts of this formula in the single 

 statement &quot; Whatever [S] has any mark [Af] has that (P or not P) which 

 it is a mark of&quot;? 



WELTON, Logic, I., bk. iv., chaps, i., ii. JOSEPH, Logic, chaps, xi., xii., 

 xiv. MILL, Logic, n., ii. MERCIER, Logique (4th edit., Louvain, 1905), 

 pp. 177 sqq. JOYCE, Logic, chaps, xi., xii. 



1 JOSEPH, op. cit., p. 285, n. 2. 2 MILL, Logic, bk. ii., chap, ii., 4. 



