premise: A child wearing a green t-shirt takes his first steps across a playground bridge.
hypothesis: A child playing in the sand.
explanation_1: The child cannot simultaneously be in the sand and on a playground bridge
explanation_2: child can't be playing in sand if he takes his first steps
explanation_3: A child is not in the sand if he is walking across a playground bridge.
premise_logic: exists e1 e2 s1 s2 x1 x2 x3 x4 x5 x6.(Theme(e2,x4) & Actor(e2,x1) & v_take(e2) & across(x4,x5) & n_bridge(x5) & of(x5,x6) & n_playground(x6) & n_step(x4) & a_first(s2) & Theme(s2,x4) & of(x4,x1) & n_male(x1) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_t-shirt(x3) & a_green(s1) & Theme(s1,x3) & (x1 = x2) & n_child(x1))
hypothesis_logic: exists x1 x2 x3.(n_sand(x3) & a_topic(x1) & in(x1,x3) & n_playing(x1) & of(x1,x2) & n_child(x2))