premise: A lady reading a story book.
hypothesis: A lady reads a science textbook.
explanation_1: The lady cannot simultaneously be reading a story book and a science textbook
explanation_2: Either the book is a story book or a science book.
explanation_3: A person can't read a science textbook and a story book at the same time
premise_logic: exists e1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_read(e1) & n_book(x3) & of(x3,x4) & n_story(x4) & (x1 = x2) & n_lady(x1))
hypothesis_logic: exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_read(e1) & n_textbook(x2) & of(x2,x3) & n_science(x3) & n_lady(x1))