premise: A snowboarder crashes into another.
hypothesis: A skiier does not crash into anything.
explanation_1: A skier does not have to be a snowboarder.  Someone either crashes into something or not.
premise_logic: exists e1 x1 x2.(into(e1,x2) & n_thing(x2) & Actor(e1,x1) & v_crash(e1) & n_snowboarder(x1))
hypothesis_logic: exists x1.(-exists e1.(all x2.(n_thing(x2) -> into(e1,x2)) & Actor(e1,x1) & v_crash(e1)) & n_skiier(x1))
premise_sim: exists e1 x1 x2.(v_crash(e1) & n_thing(x2) & n_snowboarder(x1) & into(e1,x2) & Actor(e1,x1))
hypothesis_sim: exists x1.(n_skiier(x1) & all e1.(exists x2.(n_thing(x2) & -into(e1,x2)) | -v_crash(e1) | -Actor(e1,x1)))