premise: The sky is blue
hypothesis: the sky is grey
explanation_1: the sky cannot be both blue and grey.
premise_logic: exists s1 x1.(n_sky(x1) & Theme(s1,x1) & a_blue(s1))
hypothesis_logic: exists s1 x1.(n_sky(x1) & Theme(s1,x1) & a_grey(s1))
premise_sim: exists s1 x1.(n_sky(x1) & a_blue(s1) & Theme(s1,x1))
hypothesis_sim: exists s1 x1.(n_sky(x1) & a_grey(s1) & Theme(s1,x1))