premise: A man wearing no shirt is lifting a shovel by a wheelbarrow as he works outside.
hypothesis: A woman wearing a snowsuit is skiing.
explanation_1: These are 2 completely separate thoughts.  Sentence 1 references a man with no shirt working outside.  Sentence 2 is a woman wearing a snowsuit while skiing.  The only similarity is that they are both outside.
explanation_2: The subject can either be a man wearing no shirt or a woman wearing a snowsuit, but cannot be both simultaneously.
explanation_3: A man and woman belong to different genders.
premise_logic: exists e1 p1 x1 x2 x3 x4.(exists e3 s1.(a_outside(s1) & Manner(e3,s1) & Actor(e3,x1) & v_work(e3)) & n_male(x1) & as(e1,p1) & Theme(e1,x3) & Actor(e1,x1) & v_lift(e1) & by(x3,x4) & n_wheelbarrow(x4) & n_shovel(x3) & -exists e2 x5.(Theme(e2,x5) & Actor(e2,x2) & v_wear(e2) & n_shirt(x5)) & (x1 = x2) & n_man(x1))
hypothesis_logic: exists e1 p1 x1 x2 x3.(exists x4.((x1 = x4) & n_skiing(x4)) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_snowsuit(x3) & (x1 = x2) & n_woman(x1))
premise_sim: exists e1 p1 x1 x2 x3 x4.(v_lift(e1) & n_wheelbarrow(x4) & n_shovel(x3) & n_man(x1) & n_male(x1) & exists e3 s1.(v_work(e3) & a_outside(s1) & Manner(e3,s1) & Actor(e3,x1)) & by(x3,x4) & as(e1,p1) & all e2 x5.(-v_wear(e2) | -n_shirt(x5) | -Theme(e2,x5) | -Actor(e2,x2)) & Theme(e1,x3) & Actor(e1,x1) & (x1 = x2))
hypothesis_sim: exists e1 x1 x2 x3.(v_wear(e1) & n_woman(x1) & n_snowsuit(x3) & exists x4.(n_skiing(x4) & (x1 = x4)) & Theme(e1,x3) & Actor(e1,x2) & (x1 = x2))