premise: A man is in the bed of a truck holding a bag while a boy sits in the cab of the truck. hypothesis: A dad is packing stuff from the back of his truck, while his son sits in the front.
neutral: The relationship of the man and the boy is not necessarily dad and son. Holding the bag in the bed of the truck does not imply that the stuff is being packed from the back of the truck to another location; they could be loading stuff into the truck.