premise: Three boys wearing life jackets are on top of innertube in the water.
hypothesis: Three boys are swimming.
explanation_1: The boys are wearing life jackets while swimming.
explanation_2: Boys are swimming on top of an innertube.
explanation_3: The boys are in water because that's where swimming takes place.
premise_logic: exists e1 p1 x1 x2 x3 x4.(n_water(x4) & in(p1,x4) & exists x5 x6.(on(x1,x5) & of(x5,x6) & n_innertube(x6) & n_top(x5)) & n_jacket(x1) & of(x1,x3) & n_life(x3) & Actor(e1,x1) & v_wear(e1) & of(x1,x2) & n_boy(x2) & card_eq_3(x1))
hypothesis_logic: exists e1 x1.(Actor(e1,x1) & v_swim(e1) & n_boy(x1) & card_eq_3(x1))