premise: A person wearing jeans, a blue shirt and a helmet is riding a four-wheeler in a sandy area.
hypothesis: A man is driving a four wheeler on the beach.
explanation_1: Just because a person is driving a four wheeler in a sandy area doesn't mean that person is driving on a beach.
explanation_2: Not every sandy area is a beach
explanation_3: Someone who is riding a four-wheeler, isn't necessarily driving it, the person could be a passenger.  Not all persons's are men.
premise_logic: exists e1 e2 s1 s2 x1 x2 x3 x4 x5 x6 x7 x8.(rel(e1,x6) & Theme(e2,x8) & Actor(e2,x7) & v_wear(e2) & n_jeans(x8) & (x6 = x7) & n_person(x6) & in(e1,x5) & n_area(x5) & a_sandy(s2) & Theme(s2,x5) & Theme(e1,x4) & Actor(e1,x1) & v_ride(e1) & n_four-wheeler(x4) & subset_of(x3,x1) & n_helmet(x3) & subset_of(x2,x1) & n_shirt(x2) & a_blue(s1) & Theme(s1,x2))
hypothesis_logic: exists e1 x1 x2 x3.(n_beach(x3) & on(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_drive(e1) & n_wheeler(x2) & card_eq_4(x2) & n_man(x1))