premise: A snowboarder on a wide plain of snow
hypothesis: A snowmobile in a blizzard
explanation_1: A snowboarder would be on a board rather than a snowmobile. It might not have been a blizzard that deposited the wide plain of snow.
explanation_2: Just because there is a snowboard doesn't mean there is a snowmobile. Just because there is snow doesn't mean that it is a blizzard.
explanation_3: The snowboarder may not be riding a snowmobile, and there also may not be a blizzard occuring at the time.
premise_logic: exists s1 x1 x2 x3.(a_topic(x1) & on(x1,x2) & of(x2,x3) & n_snow(x3) & n_plain(x2) & a_wide(s1) & Theme(s1,x2) & n_snowboarder(x1))
hypothesis_logic: exists x1 x2.(a_topic(x1) & in(x1,x2) & n_blizzard(x2) & n_snowmobile(x1))
premise_sim: exists s1 x1 x2 x3.(on(x1,x2) & of(x2,x3) & n_snowboarder(x1) & n_snow(x3) & n_plain(x2) & a_wide(s1) & a_topic(x1) & Theme(s1,x2))
hypothesis_sim: exists x1 x2.(n_snowmobile(x1) & n_blizzard(x2) & in(x1,x2) & a_topic(x1))