Someone lends his car to his friend for the day. After the friend returns the car, the owner finds some items left in the car. May he keep them under the assumption that once the car is returned he retakes full ownership, and anything in the car is his, automatically?
Or, do we assume that even after returning the car, we assume that the borrower forgot these items and hopes to get them back?
Or, does it depend on the type of item? For example, the borrower would expect his coat or computer returned. But, if he forgot newspapers or a candy bar, maybe not?