premise: The boy in pajama pants jumps off the sofa.
hypothesis: The boy is jumping up
explanation_1: Jumping has to involve some upward momentum; that a boy jumps off something strongly implies that he is jumping up.
explanation_2: Boy in pajama pants is a type of boy, and jumps off is a paraphrase of jumping up.
explanation_3: The boy is jumping up off the sofa.
premise_logic: exists e1 s1 x1 x2 x3 x4.(n_sofa(x4) & n_boy(x1) & a_off(s1) & Manner(e1,s1) & Theme(e1,x4) & Actor(e1,x1) & v_jump(e1) & in(x1,x2) & n_pants(x2) & of(x2,x3) & n_pajama(x3))
hypothesis_logic: exists e1 s1 x1.(n_boy(x1) & a_up(s1) & Manner(e1,s1) & Actor(e1,x1) & v_jump(e1))
premise_sim: exists e1 s1 x1 x2 x3 x4.(v_jump(e1) & of(x2,x3) & n_sofa(x4) & n_pants(x2) & n_pajama(x3) & n_boy(x1) & in(x1,x2) & a_off(s1) & Theme(e1,x4) & Manner(e1,s1) & Actor(e1,x1))
hypothesis_sim: exists e1 s1 x1.(v_jump(e1) & n_boy(x1) & a_up(s1) & Manner(e1,s1) & Actor(e1,x1))