premise: Three people on a beach.
hypothesis: The people each have one head.
explanation_1: People only have one head.
explanation_2: It's an universal fact that people having one head.
explanation_3: Three separate persons can also be called people.
premise_logic: exists x1 x2.(a_topic(x1) & on(x1,x2) & n_beach(x2) & n_people(x1) & card_eq_3(x1))
hypothesis_logic: exists x2.(n_people(x2) & all x1.((x1 = x2) -> exists e1 x3.(Theme(e1,x3) & Actor(e1,x1) & v_have(e1) & n_head(x3) & card_eq_1(x3))))