premise: A skateboarder in the air straddling his upside-down skateboard.
hypothesis: A little girl tears the head off of her doll.
explanation_1: you wouldn't be playing with a doll while upside-down on a skateboard
explanation_2: His refers to a male, not a female. One does not generally tear the head off of a doll while skateboarding.
explanation_3: Straddling a skateboard is not the same as tearing off a dolls head.
premise_logic: exists e1 s1 x1 x2 x3 x4.(n_skateboard(x4) & a_upside-down(s1) & Theme(s1,x4) & of(x4,x2) & n_male(x2) & n_air(x2) & a_topic(x1) & in(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_straddle(e1) & (x2 = x3) & n_skateboarder(x1))
hypothesis_logic: exists e1 s1 x1 x2 x3.(n_doll(x3) & of(x3,x2) & n_female(x2) & n_head(x2) & of(e1,x3) & r_off(e1) & Theme(e1,x2) & Actor(e1,x1) & v_tear(e1) & n_girl(x1) & a_little(s1) & Theme(s1,x1))