premise: A man in a blue shirt and tan shorts has his feet in the steps of an exercise bicycle and is working on the control panel of the machine.
hypothesis: The man is old
explanation_1: Nothing in the first sentence indicates anything about the relative age of the man it is describing, and therefore the man being old cannot be determined without the second sentence.
explanation_2: It cannot be implied that the man is old because he is using an exercise bicycle.
explanation_3: Being a man on an exercise bicycle doesn't imply being old.
premise_logic: exists e2 e1 s1 s2 s3 s4 x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11 x12 x13 x14 x15.(n_machine(x15) & n_panel(x13) & of(x13,x14) & n_control(x14) & n_step(x6) & on(e2,x13) & of(x13,x15) & Actor(e2,x9) & v_work(e2) & in(x9,x10) & subset_of(x12,x10) & n_shorts(x12) & a_tan(s4) & Theme(s4,x12) & subset_of(x11,x10) & n_shirt(x11) & a_blue(s3) & Theme(s3,x11) & n_man(x9) & Theme(e1,x5) & Actor(e1,x1) & v_have(e1) & in(x5,x6) & of(x6,x7) & n_bicycle(x7) & of(x7,x8) & n_exercise(x8) & n_foot(x5) & of(x5,x1) & n_male(x1) & in(x1,x2) & subset_of(x4,x2) & n_shorts(x4) & a_tan(s2) & Theme(s2,x4) & subset_of(x3,x2) & n_shirt(x3) & a_blue(s1) & Theme(s1,x3) & n_man(x1))
hypothesis_logic: exists s1 x1.(n_man(x1) & Theme(s1,x1) & a_old(s1))