premise: A boy on a skateboard ramp.
hypothesis: The girl is waiting on her bike
explanation_1: It must be either a boy or a girl.
explanation_2: One cannot be a boy and girl simultaneously.
explanation_3: A girl is not a boy. The girl is on her bike, not a skateboard ramp.
premise_logic: exists x1 x2 x3.(a_topic(x1) & on(x1,x2) & n_ramp(x2) & of(x2,x3) & n_skateboard(x3) & n_boy(x1))
hypothesis_logic: exists e1 x1 x2.(n_bike(x2) & of(x2,x1) & n_female(x1) & n_girl(x1) & on(e1,x2) & Actor(e1,x1) & v_wait(e1))