It will be remembered that this scheme is based upon a particular interpretation of propositions as regards their existential import. The student will find it useful to attempt to represent by Dr Venn’s diagrams a mood containing a strengthened premiss, for example, Darapti.
EXERCISES.
291. Represent Celarent by the aid of Euler’s diagrams. Will the same set of diagrams serve for any other of the syllogistic moods? [K.]
292. Represent by means of the Eulerian diagrams the moods Festino, Datisi, and Bramantip. [K.]
293. Determine (i) by the aid of Euler’s diagrams, (ii) by ordinary syllogistic methods, what is all that can be inferred about S and P in terms of one another from the following premisses, Some M is P, Some M is not P, Some P is not M, Some S is not M, All M is S. [K.]
294. Represent in Lambert’s scheme the moods Darii, Cesare, Darapti, Bocardo, Fesapo. [K.]
295. Represent in Dr Venn’s diagrammatic scheme the moods Ferio, Cesare, Baroco, Dimaris. [K.]
296. Shew (i) by means of Euler’s diagrams, (ii) by means of Dr Venn’s diagrams, that IE yields no conclusion in any figure. [K.]