premise: A boy plays in the surf.
hypothesis: The boy is building a tent.
explanation_1: The boy cannot be building a tent and play in the surf simultaneously
explanation_2: If a boy plays in the surf the boy is not building a tent.
explanation_3: One would never build a tent where the surf comes onshore.
premise_logic: exists e1 x1 x2.(n_surf(x2) & in(e1,x2) & Actor(e1,x1) & v_play(e1) & n_boy(x1))
hypothesis_logic: exists e1 x1 x2.(n_boy(x1) & Theme(e1,x2) & Actor(e1,x1) & v_build(e1) & n_tent(x2))