premise: a tractor digging in dirt.
hypothesis: A person is in a tractor.
explanation_1: Not all tractors have a person in them. Some can be controlled remotely, there are even such things as robotic tractors.
premise_logic: exists e1 x1 x2 x3.(a_topic(x1) & in(e1,x3) & n_dirt(x3) & Actor(e1,x2) & v_dig(e1) & (x1 = x2) & n_tractor(x1))
hypothesis_logic: exists p1 x1.(exists x2.(in(x1,x2) & n_tractor(x2)) & n_person(x1))
premise_sim: exists e1 x1 x2 x3.(v_dig(e1) & n_tractor(x1) & n_dirt(x3) & in(e1,x3) & a_topic(x1) & Actor(e1,x2) & (x1 = x2))
hypothesis_sim: exists x1.(n_person(x1) & exists x2.(n_tractor(x2) & in(x1,x2)))