premise: A man on a bike, with the sun beating down in the background, just launched off of a dirt ramp and is coming back down.
hypothesis: A professional bike rider performing tricks.
explanation_1: You can ride a bike off a ramp and not be a professional or performing tricks.
explanation_2: It is not assumed that the man on the bike is a professional, but it is assumed he is doing tricks because he launched off the dirt ramp.
explanation_3: A person can be on a bike without being a professional.
premise_logic: exists e4 e1 e2 e3 s1 s2 s3 s4 x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11 x12 x13 x14.(n_background(x13) & n_sun(x11) & n_background(x5) & n_sun(x3) & a_topic(x9) & r_back(e4) & a_down(s4) & Manner(e4,s4) & Actor(e4,x14) & v_come(e4) & (x9 = x14) & on(x9,x10) & with(x10,x11) & in(e3,x13) & a_down(s3) & Manner(e3,s3) & Actor(e3,x12) & v_beat(e3) & (x11 = x12) & n_bike(x10) & n_man(x9) & a_topic(x1) & of(e2,x7) & n_ramp(x7) & of(x7,x8) & n_dirt(x8) & r_off(e2) & a_just(s2) & Manner(e2,s2) & Theme(e2,x6) & v_launch(e2) & (x1 = x6) & on(x1,x2) & with(x2,x3) & in(e1,x5) & a_down(s1) & Manner(e1,s1) & Actor(e1,x4) & v_beat(e1) & (x3 = x4) & n_bike(x2) & n_man(x1))
hypothesis_logic: exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x4) & Actor(e1,x3) & v_perform(e1) & n_trick(x4) & (x1 = x3) & n_rider(x1) & of(x1,x2) & n_bike(x2) & a_professional(s1) & Theme(s1,x1))