premise: A skilled calligrapher is working at his art.
hypothesis: he is creating his best art to date
explanation_1: Working at ones art does not mean that is the creation of the best art to date.
explanation_2: Just because a skilled calligrapher is working at his art, doesn't mean he is creating his best art to date.
explanation_3: Working at his art doesn't necessarily mean creating his best art to date.
premise_logic: exists e1 s1 x1 x2.(at(e1,x2) & n_art(x2) & of(x2,x1) & n_male(x1) & Actor(e1,x1) & v_work(e1) & n_calligrapher(x1) & a_skilled(s1) & Theme(s1,x1))
hypothesis_logic: exists e1 s1 x1 x2.(to(e1,x1) & n_date(x1) & Theme(e1,x2) & Actor(e1,x1) & v_create(e1) & n_art(x2) & r_most(s1) & a_good(s1) & Theme(s1,x2) & of(x2,x1) & n_male(x1) & n_male(x1))