premise: A man and a woman greeting each other on bikes in front of a building.
hypothesis: A couple meets for a ride.
explanation_1: A man and woman greeting each other are not assumed to be a couple who meets.  Being on bikes does not necessarily imply that they are going to go for a ride.
premise_logic: exists s1 x1 x2 x3.(a_topic(s1) & subset_of(x2,s1) & all x4.(n_other(x4) -> exists e1 x5 x6 x7.(in(e1,x6) & of(x6,x7) & n_building(x7) & n_front(x6) & on(e1,x5) & n_bike(x5) & Theme(e1,x4) & Actor(e1,x3) & v_greet(e1))) & (x2 = x3) & n_woman(x2) & subset_of(x1,s1) & n_man(x1))
hypothesis_logic: exists e1 x1 x2.(for(e1,x2) & n_ride(x2) & Actor(e1,x1) & v_meet(e1) & n_couple(x1))
premise_sim: exists s1 x1 x2 x3.(subset_of(x2,s1) & subset_of(x1,s1) & n_woman(x2) & n_man(x1) & all x4.(exists e1 x5 x6 x7.(v_greet(e1) & on(e1,x5) & of(x6,x7) & n_front(x6) & n_building(x7) & n_bike(x5) & in(e1,x6) & Theme(e1,x4) & Actor(e1,x3)) | -n_other(x4)) & a_topic(s1) & (x2 = x3))
hypothesis_sim: exists e1 x1 x2.(v_meet(e1) & n_ride(x2) & n_couple(x1) & for(e1,x2) & Actor(e1,x1))