premise: A man wearing protective gear grinds down a large metal object.
hypothesis: The man does not have any gear on.
explanation_1: man is wearing protective gear rather than not having any gear on
explanation_2: The man wearing protective gear can't also does not have any gear on.
explanation_3: man can't not have gear on if he is wearing gear
premise_logic: exists e2 e1 s1 s2 s3 x1 x2 x3 x4.(a_down(s3) & Manner(e2,s3) & Theme(e2,x3) & Actor(e2,x1) & v_grind(e2) & n_object(x3) & of(x3,x4) & n_metal(x4) & a_large(s2) & Theme(s2,x3) & n_gear(x1) & a_protective(s1) & Theme(s1,x1) & Actor(e1,x1) & v_wear(e1) & of(x1,x2) & n_man(x2))
hypothesis_logic: exists x1.(n_man(x1) & -all x2.(n_gear(x2) -> exists e1 s1.(a_on(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1))))