premise: Boy standing in line in a grocery store with his items on the conveyor belt.
hypothesis: He is waiting to pay.
explanation_1: A person in line at the store is waiting to pay.
explanation_2: A boy is male and can therefore be referred to as He. The fact that the boy is standing in line with his items on the conveyor belt tells us that he is waiting to pay for his items.
explanation_3: The conveyor belt in a grocery store is located in the aisle used to check out. The boy has items on the conveyor belt and is standing in line. That means that he is waiting for the cashier to scan his items and give him the total due, so he is waiting to pay.
premise_logic: exists x1 x2 x3 x4 x5 x6 x7 x8.(n_belt(x7) & of(x7,x8) & n_conveyor(x8) & a_topic(x1) & in(x1,x3) & with(x3,x6) & on(x6,x7) & n_item(x6) & of(x6,x1) & n_male(x1) & in(x3,x4) & n_store(x4) & of(x4,x5) & n_grocery(x5) & n_line(x3) & n_standing(x1) & (x1 = x2) & ne_nam_boy(x2))
hypothesis_logic: exists e1 p1 x1.(n_male(x1) & Topic(e1,p1) & Actor(e1,x1) & v_wait(e1) & exists e2.(Actor(e2,x1) & v_pay(e2)))