Suppose that the seller is very attached to her home and wishes to sell only to someone who will maintain the property as a single family dwelling. A prospective buyer says that he, too, wants to use the property as a single-family dwelling. The sale is completed, and the seller moves out. However, several days later, she learns that the buyer intended all along to demolish the house in order to open a commercial establishment. Does efficiency commend enforcing the contract or rescinding it?