premise: A skydiving instructor with a student strapped together while skydiving.
hypothesis: Two man are sitting down inside.
explanation_1: You cannot be sitting down, let alone inside if you are skydiving.
explanation_2: Skydiving usually occurs outside instead of inside.  People cannot be sitting down while skydiving.
explanation_3: Two men cannot be  skydiving and  sitting down inside at the same time.
premise_logic: exists e2 e3 e1 p1 x1 x2 x3.(a_topic(x1) & with(x1,x2) & while(e2,e3) & Actor(e3,x3) & v_skydive(e3) & exists s1.(Theme(s1,x3) & a_together(s1)) & Recipient(e2,p1) & Topic(e2,x3) & v_strap(e2) & (x2 = x3) & n_student(x2) & n_instructor(x1) & Actor(e1,x1) & v_skydive(e1))
hypothesis_logic: exists e1 p1 s1 x1.(a_inside(s1) & Manner(e1,s1) & exists s2.(Theme(s2,x1) & a_down(s2)) & Topic(e1,p1) & Actor(e1,x1) & v_sit(e1) & n_man(x1) & card_eq_2(x1))