premise: A man is using what looks to be a fax machine.
hypothesis: A sad man is using what looks to be a fax machine.
explanation_1: Men are not necessarily sad.
explanation_2: Not all men are sad.
explanation_3: Man using  a fax machine doesn't mean that the man is a sad man.
premise_logic: exists x1.(exists e2 e1 p1 x2.(n_thing(x2) & Theme(e2,x2) & Actor(e2,x1) & v_use(e2) & Topic(e1,p1) & Actor(e1,x2) & v_look(e1) & exists p2 x3 x4.((x2 = x3) & n_machine(x3) & of(x3,x4) & n_fax(x4))) & n_man(x1))
hypothesis_logic: exists s1 x1.(exists e2 e1 p1 x2.(n_thing(x2) & Theme(e2,x2) & Actor(e2,x1) & v_use(e2) & Topic(e1,p1) & Actor(e1,x2) & v_look(e1) & exists p2 x3 x4.((x2 = x3) & n_machine(x3) & of(x3,x4) & n_fax(x4))) & n_man(x1) & a_sad(s1) & Theme(s1,x1))