premise: 3 girls chatting and laughing on the stairwell.
hypothesis: A group of girls are having fun.
explanation_1: Chatting and laughing doesn't necessarily imply they are having fun.
explanation_2: Just because three girls are chatting and laughing on the stairwell it does not mean the girls are having fun.
explanation_3: It could have been nervous laughter and therefore the girls might not have been having fun.
premise_logic: exists e2 e1 x1 x2 x3.(n_stairwell(x3) & on(e2,x3) & Actor(e2,x2) & v_laugh(e2) & n_girl(x2) & n_date(x2) & a_date_day_03(x2) & a_date_day_03(x2) & Actor(e1,x1) & v_chat(e1) & n_girl(x1) & n_date(x1) & a_date_day_03(x1) & a_date_day_03(x1))
hypothesis_logic: exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_have(e1) & n_fun(x3) & of(x1,x2) & n_girl(x2) & n_group(x1))
premise_sim: exists e2 e1 x1 x2 x3.(v_laugh(e2) & v_chat(e1) & on(e2,x3) & n_stairwell(x3) & n_girl(x2) & n_girl(x1) & n_date(x2) & n_date(x1) & a_date_day_03(x2) & a_date_day_03(x1) & Actor(e2,x2) & Actor(e1,x1))
hypothesis_sim: exists e1 x1 x2 x3.(v_have(e1) & of(x1,x2) & n_group(x1) & n_girl(x2) & n_fun(x3) & Theme(e1,x3) & Actor(e1,x1))