premise: A family with young children sits down outside.
hypothesis: A man and wife sit outside with their children.
explanation_1: Not all children are young.  A family does not necessarily consist of a man, wife, and their children.
explanation_2: A family is not necessarily a man and wife
explanation_3: Not all families consist of a man and a wife.
premise_logic: exists e1 s1 s2 s3 x1 x2.(a_outside(s3) & Manner(e1,s3) & a_down(s2) & Manner(e1,s2) & Actor(e1,x1) & v_sit(e1) & with(x1,x2) & n_child(x2) & a_young(s1) & Theme(s1,x2) & n_family(x1))
hypothesis_logic: exists e1 x1 x2 x3 x4.(with(e1,x4) & n_child(x4) & of(x4,x2) & n_thing(x2) & r_outside(e1) & Actor(e1,x1) & v_sit(e1) & n_wife(x3) & n_man(x2) & subset_of(x3,x1) & subset_of(x2,x1))
premise_sim: exists e1 s1 s2 s3 x1 x2.(with(x1,x2) & v_sit(e1) & n_family(x1) & n_child(x2) & a_young(s1) & a_outside(s3) & a_down(s2) & Theme(s1,x2) & Manner(e1,s3) & Manner(e1,s2) & Actor(e1,x1))
hypothesis_sim: exists e1 x1 x2 x3 x4.(with(e1,x4) & v_sit(e1) & subset_of(x3,x1) & subset_of(x2,x1) & r_outside(e1) & of(x4,x2) & n_wife(x3) & n_thing(x2) & n_man(x2) & n_child(x4) & Actor(e1,x1))