premise: A youth skateboards by a mural of a griffin wielding a flaming sword.
hypothesis: A youth bikes by a mural.
explanation_1: the youth must be either riding on skateboards or bikes.
explanation_2: A youth that skateboards by a mural cannot be the same youth that bikes by the mural.
explanation_3: bikes are not skateboards and he can't do both at once
premise_logic: exists e1 x1 x2 x3 x4 x5 x6 x7.(a_topic(x1) & by(x1,x3) & of(x3,x4) & Theme(e1,x6) & Actor(e1,x5) & v_wield(e1) & n_sword(x6) & of(x6,x7) & n_flaming(x7) & (x4 = x5) & n_griffin(x4) & n_mural(x3) & n_skateboard(x1) & of(x1,x2) & n_youth(x2))
hypothesis_logic: exists x1 x2 x3.(a_topic(x1) & by(x1,x3) & n_mural(x3) & n_bike(x1) & of(x1,x2) & n_youth(x2))
premise_sim: exists e1 x1 x2 x3 x4 x5 x6 x7.(v_wield(e1) & of(x6,x7) & of(x3,x4) & of(x1,x2) & n_youth(x2) & n_sword(x6) & n_skateboard(x1) & n_mural(x3) & n_griffin(x4) & n_flaming(x7) & by(x1,x3) & a_topic(x1) & Theme(e1,x6) & Actor(e1,x5) & (x4 = x5))
hypothesis_sim: exists x1 x2 x3.(of(x1,x2) & n_youth(x2) & n_mural(x3) & n_bike(x1) & by(x1,x3) & a_topic(x1))