premise: A man wearing black pants and a helmet is riding a brown horse.
hypothesis: A man is riding a mammoth.
explanation_1: The man isn't riding a horse and a mammoth at the same time.
explanation_2: the man is either on a horse or a mammoth
explanation_3: The man is either riding a horse or riding a mammoth.
premise_logic: exists e2 e1 s1 s2 x1 x2 x3 x4 x5 x6.(Theme(e2,x6) & Actor(e2,x1) & v_ride(e2) & n_horse(x6) & a_brown(s2) & Theme(s2,x6) & subset_of(x5,x1) & n_helmet(x5) & subset_of(x2,x1) & Theme(e1,x4) & Actor(e1,x3) & v_wear(e1) & n_pants(x4) & a_black(s1) & Theme(s1,x4) & (x2 = x3) & n_man(x2))
hypothesis_logic: exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_mammoth(x2) & n_man(x1))