(i) All schools are boats ⇒ Universal Affirmative (A-type). (ii) Some men are books ⇒ Particular Affirmative (I-type). (iii) No men are boys ⇒ Universal Negative (E-type). (iv) Some men are not boys ⇒ Particular Negative (O-type). Some men are books No books are schools. I + E ⇒ O-type of Conclusion “Some men are not schools." This is Conclusion I. No books are schools All schools are boats. E + A ⇒ O1 - type of Conclusion "Some boats are not books.” This is Conclusion IV.