premise: A zoo worker is inside an exhibit, playing with a tiger that is climbing up a tree.
hypothesis: He is scared.
explanation_1: Zoo workers are used to working with animals, and may feel quite confident around them.  There is no reason to assume that the worker- who may not be male- is scared.
premise_logic: exists e1 e2 p1 s1 x1 x2 x3 x4 x5.(for(p1,e1) & with(e1,x3) & a_up(s1) & Manner(e2,s1) & Theme(e2,x5) & Actor(e2,x4) & v_climb(e2) & n_tree(x5) & (x3 = x4) & n_tiger(x3) & Actor(e1,x1) & v_play(e1) & exists x6.(inside(x1,x6) & n_exhibit(x6)) & n_worker(x1) & of(x1,x2) & n_zoo(x2))
hypothesis_logic: exists e1 x1.(n_male(x1) & Theme(e1,x1) & v_scare(e1))
premise_sim: exists e1 e2 p1 s1 x1 x2 x3 x4 x5.(with(e1,x3) & v_play(e1) & v_climb(e2) & of(x1,x2) & n_zoo(x2) & n_worker(x1) & n_tree(x5) & n_tiger(x3) & for(p1,e1) & exists x6.(n_exhibit(x6) & inside(x1,x6)) & a_up(s1) & Theme(e2,x5) & Manner(e2,s1) & Actor(e2,x4) & Actor(e1,x1) & (x3 = x4))
hypothesis_sim: exists e1 x1.(v_scare(e1) & n_male(x1) & Theme(e1,x1))