premise: A teenage is on a surfboard.
hypothesis: a teen is surfing
explanation_1: Surfing is what one does on a surfboard.
explanation_2: If a teenager is on a surfboard then they must be surfing.
explanation_3: If he on his surfboard, he is surfing.
premise_logic: exists p1 x1.(exists x2.(on(x1,x2) & n_surfboard(x2)) & n_teenage(x1))
hypothesis_logic: exists e1 x1.(Actor(e1,x1) & v_surf(e1) & n_teen(x1))
premise_sim: exists x1.(n_teenage(x1) & exists x2.(on(x1,x2) & n_surfboard(x2)))
hypothesis_sim: exists e1 x1.(v_surf(e1) & n_teen(x1) & Actor(e1,x1))