premise: Three girls are sitting at desks and appear to be working intently.
hypothesis: Several boys are standing in a field.
explanation_1: Girls are not boys. One can't be sitting and standing at the same time.
explanation_2: The girls are indoors sitting at desks they cannot be boys outside in a field.
explanation_3: It is either three girls or several boys, and they cannot be sitting and standing at the same time.
premise_logic: exists e1 e2 p1 x1 x2 x3.(Topic(e2,p1) & Actor(e2,x3) & v_appear(e2) & exists e3 s1.(a_intently(s1) & Manner(e3,s1) & Actor(e3,x3) & v_work(e3)) & n_girl(x3) & card_eq_3(x3) & at(e1,x2) & n_desk(x2) & Actor(e1,x1) & v_sit(e1) & n_girl(x1) & card_eq_3(x1))
hypothesis_logic: exists e1 s1 x1 x2.(in(e1,x2) & n_field(x2) & Actor(e1,x1) & v_stand(e1) & n_boy(x1) & a_several(s1) & Theme(s1,x1))