premise: Naked children play on the muddy riverbank.
hypothesis: THE RIVERBANK STAYED CLEAN EVERYDAY
explanation_1: The riverbank cannot simultaneously be muddy and clean
explanation_2: The muddy riverbank is not clean.
explanation_3: Muddy is not clean.
premise_logic: exists e2 e1 s1 x1 x2.(n_riverbank(x2) & a_muddy(s1) & Theme(s1,x2) & on(e2,x2) & Actor(e2,x1) & v_play(e2) & n_child(x1) & Theme(e1,x1) & v_nake(e1))
hypothesis_logic: exists e1 x1 x2 x3.(ne_nam_everyday(x2) & (x2 = x3) & ne_nam_clean(x3) & ne_nam_riverbank(x1) & Theme(e1,x2) & Actor(e1,x1) & v_stay(e1))