premise: A man wearing a blue jacket fishing in a river having a conversation with his friend with no shirt.
hypothesis: Guys at a campsite, building a fire.
explanation_1: Guys cannot be one man.  A river is not a campsite and fishing is not building a fire.
explanation_2: Fishing and building a fire can't be at the same time.
explanation_3: You can't fish in a river and build a fire at a campsite at the same time.
premise_logic: exists e2 e1 s1 x1 x2 x3 x4 x5 x6 x7 x8.(a_topic(x1) & Theme(e2,x3) & Actor(e2,x2) & v_wear(e2) & in(x3,x5) & -exists x9.(with(e1,x8) & with(x8,x9) & n_shirt(x9)) & n_friend(x8) & of(x8,x1) & n_male(x1) & Theme(e1,x7) & Actor(e1,x6) & v_have(e1) & n_conversation(x7) & (x5 = x6) & n_river(x5) & n_fishing(x3) & of(x3,x4) & n_jacket(x4) & a_blue(s1) & Theme(s1,x3) & (x1 = x2) & n_man(x1))
hypothesis_logic: exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_build(e1) & n_fire(x3) & at(x1,x2) & n_campsite(x2) & n_guy(x1))