premise: A man and his two sons purchase food.
hypothesis: They are playing basketball.
explanation_1: It is impossible to play basketball while you're purchasing food.
explanation_2: You can't purchase food while playing basketball.
explanation_3: To purchase food and playing basketball are different.
premise_logic: exists s1 x1 x2 x3 x4.(a_topic(s1) & subset_of(x2,s1) & n_food(x2) & of(x2,x4) & n_purchase(x4) & of(x2,x3) & n_son(x3) & card_eq_2(x2) & of(x2,x1) & n_male(x1) & subset_of(x1,s1) & n_man(x1))
hypothesis_logic: exists e1 x1 x2.(n_thing(x1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_basketball(x2))