(i) All plots are themes → UniversalAffirmative (A–type). (ii) Some themes are fictions →Particular Affirmative (I–type). (iii) No fiction is a biography →Universal Negative (E–type). (iv) Some fictions are not biographies→Particular Negative(O–type). (5) Some themes are fictions.No fiction is a biography. I + E ⇒ O–type of Conclusion“Some themes are not biographies”. Venn diagrams of “All plots arethemes” :
Venn diagrams of “Somethemes are not biographies” :
After combining venn diagramsII and IV, we get :
Venn diagram VI contradictsthe Conclusion I. Ven diagrams III and IV supportsthe Conclusion II.