This is an exercise set of problems on LOGIC, Chapter Four of Mohr's Introduction to Philosophy, 5th edition.To test the validity of a categorical syllogism and the correctness of its diagram, see "The Power of Logic," http://www.poweroflogic.com/cgi/Venn/venn.cgi?exercise=6.4B
Or see Garth Kemerling: http://www.philosophypages.com/lg/e08a.htm
For a general discussion of the syllogism, see http://en.wikipedia.org/wiki/Syllogism
Copyright (c) 1997-2015 by J. Patrick Mohr, S.J.