premise: A man in a small kayak is floating down the river.
hypothesis: A man is in a boat.
explanation_1: A kayak is a boat, therefore if a man is in a kayak then he is in a boat.
explanation_2: A kayak is a boat.
explanation_3: A small kayak is a form of a boat.
premise_logic: exists e1 s1 s2 x1 x2 x3.(n_river(x3) & a_down(s2) & Manner(e1,s2) & Theme(e1,x3) & Actor(e1,x1) & v_float(e1) & in(x1,x2) & n_kayak(x2) & a_small(s1) & Theme(s1,x2) & n_man(x1))
hypothesis_logic: exists p1 x1.(exists x2.(in(x1,x2) & n_boat(x2)) & n_man(x1))