premise: two bicyclists in spandex and helmets in a race pedaling uphill.
hypothesis: The two bicyclists cross each and give each a high five as one pedals uphill, and the other downhill.
explanation_1: The two bicyclists cannot both be going uphill, and yet meet one another, one going downhill.
explanation_2: If two are pedaling up hill, one of them cannot be going downhill.
explanation_3: Two bicyclists cannot be riding uphill and them one pedaling uphill and the other downhill simultaneously.
premise_logic: exists e1 x1 x2 x3 x4 x5 x6 x7.(a_topic(x1) & in(x1,x2) & subset_of(x4,x2) & in(x4,x5) & Theme(e1,x7) & Actor(e1,x6) & v_pedal(e1) & n_uphill(x7) & (x5 = x6) & n_race(x5) & n_helmet(x4) & subset_of(x3,x2) & n_spandex(x3) & n_bicyclist(x1) & card_eq_2(x1))
hypothesis_logic: exists s1 s2 x1 x2 x3 x4 x5 x6.(-(x6 = x6) & n_downhill(x6) & n_bicyclist(x1) & card_eq_2(x1) & all x8.(n_thing(x8) -> exists e2.(Recipient(e2,x8) & Theme(e2,x2) & Actor(e2,x1) & v_give(e2))) & subset_of(x6,x2) & subset_of(x3,x2) & as(x3,x4) & Theme(s2,x5) & a_uphill(s2) & (x4 = x5) & n_pedal(x4) & card_eq_1(x4) & n_thing(x3) & card_eq_5(x3) & a_high(s1) & Theme(s1,x3) & all x7.(n_thing(x7) -> exists e1.(Theme(e1,x7) & Actor(e1,x1) & v_cross(e1))))