Final answer:
Yes, objects subject to a resolutory condition can be the object of sale, such as property that can be bought back; the sale is valid though it may be undone if the condition occurs.
Step-by-step explanation:
The question, 'Are things subject to a resolutory condition allowed to be the object of sale?', primarily involves understanding the legal concept of conditions applied to contracts, particularly sales contracts. In law, a resolutory condition is one that, upon its fulfillment, results in the resolution or termination of an existing right or contract. Therefore, an object that is sold with a resolutory condition is still a valid object of sale. Common examples include the sale of property with an option to buy back, where the initial sale is valid but it could be undone if the original owner exercises the option within the agreed timeframe.
The answer to the student's question is True; objects subject to a resolutory condition can be legally sold. The presence of this condition merely adds a potential future event which could undo the sale, but it does not invalidate the initial act of sale itself.