The man is working hard to use the saw to cut the logs.
Logs are cutting cut.
Just because a man is using the saw doesn't imply the logs are already cut.
exists e1 p1 s1 x1 x2 x3.(n_log(x3) & n_saw(x2) & n_man(x1) & Topic(e1,p1) & exists e2 p2.(Theme(e2,p2) & Recipient(e2,x2) & Actor(e2,x1) & v_use(e2) & exists e3.(Theme(e3,x3) & Actor(e3,x1) & v_cut(e3))) & a_hard(s1) & Manner(e1,s1) & Actor(e1,x1) & v_work(e1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_cut(e1) & n_cut(x2) & n_log(x1))