premise: A man and a woman are laughing.
hypothesis: A man and woman are laughing at a joke.
explanation_1: They can laugh even if there is no joke.
explanation_2: Not people who are laughing are laughing at a joke.
explanation_3: The man and woman could be laughing for another reason besides a joke.
premise_logic: exists e1 x1 x2 x3.(Actor(e1,x1) & v_laugh(e1) & subset_of(x3,x1) & n_woman(x3) & subset_of(x2,x1) & n_man(x2))
hypothesis_logic: exists e1 x1 x2 x3 x4.(at(e1,x4) & n_joke(x4) & Actor(e1,x1) & v_laugh(e1) & n_woman(x3) & n_man(x2) & subset_of(x3,x1) & subset_of(x2,x1))
premise_sim: exists e1 x1 x2 x3.(v_laugh(e1) & subset_of(x3,x1) & subset_of(x2,x1) & n_woman(x3) & n_man(x2) & Actor(e1,x1))
hypothesis_sim: exists e1 x1 x2 x3 x4.(v_laugh(e1) & subset_of(x3,x1) & subset_of(x2,x1) & n_woman(x3) & n_man(x2) & n_joke(x4) & at(e1,x4) & Actor(e1,x1))