premise: A stout gentleman does not know how to use his umbrella.
hypothesis: The man is sitting at the dinner table with his family.
explanation_1: This is not necessarily contradictory.  A man can be sitting at the dinner table and still not know how to use his umbrella.  The man may not be trying to use his umbrella at that exact moment.
premise_logic: exists x1 x2 x5.(-exists e1 x3.(Topic(e1,x3) & Actor(e1,x1) & v_know(e1) & n_manner(x3) & exists e2 x4.(Theme(e2,x5) & Actor(e2,x4) & v_use(e2))) & n_umbrella(x5) & of(x5,x1) & n_male(x1) & n_gentleman(x1) & of(x1,x2) & n_stout(x2))
hypothesis_logic: exists e1 x1 x2 x3 x4.(n_family(x4) & of(x4,x2) & n_male(x2) & n_table(x2) & of(x2,x3) & n_dinner(x3) & n_man(x1) & with(e1,x4) & at(e1,x2) & Actor(e1,x1) & v_sit(e1))
premise_sim: exists x1 x2 x5.(of(x5,x1) & of(x1,x2) & n_umbrella(x5) & n_stout(x2) & n_male(x1) & n_gentleman(x1) & all e1 x3.(all e2 x4.(-v_use(e2) | -Theme(e2,x5) | -Actor(e2,x4)) | -v_know(e1) | -n_manner(x3) | -Topic(e1,x3) | -Actor(e1,x1)))
hypothesis_sim: exists e1 x1 x2 x3 x4.(with(e1,x4) & v_sit(e1) & of(x4,x2) & of(x2,x3) & n_table(x2) & n_man(x1) & n_male(x2) & n_family(x4) & n_dinner(x3) & at(e1,x2) & Actor(e1,x1))