premise: A man in aerodynamic gear riding a bicycle down a road around a sharp curve.
hypothesis: the man is skiing
explanation_1: The man must be either skiing or riding a bicycle; he cannot do both activities at the same time.
explanation_2: The man is cannot be riding a bicycle and simultaneously skiing.
explanation_3: Riding a bicycle is different than skiing
premise_logic: exists e1 s1 s2 x1 x2 x3 x4 x5 x6.(a_topic(x1) & around(e1,x6) & n_curve(x6) & a_sharp(s2) & Theme(s2,x6) & down(e1,x5) & n_road(x5) & Theme(e1,x4) & Actor(e1,x3) & v_ride(e1) & n_bicycle(x4) & (x1 = x3) & in(x1,x2) & n_gear(x2) & a_aerodynamic(s1) & Theme(s1,x2) & n_man(x1))
hypothesis_logic: exists e1 x1.(n_man(x1) & Actor(e1,x1) & v_ski(e1))