premise: A youth skateboards by a mural of a griffin wielding a flaming sword.
hypothesis: A youth skateboards by a mural that has been vandalised.
explanation_1: Just because the person is a youthful skateboarder does not imply he vandalised the mural.
explanation_2: Not all murals of griffin are vandalised.
explanation_3: not every mural gets vandalised
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 e1 x1 x2 x3 x4.(a_topic(x1) & by(x1,x3) & Theme(e1,x4) & v_vandalise(e1) & (x3 = x4) & n_mural(x3) & n_skateboard(x1) & of(x1,x2) & n_youth(x2))