In the Landmark Case, Lucy V

In the landmark case, Lucy v. Zehmer, the court discussed the objective theory of contracts when two parties at a bar were drinking alcohol and after some negotiation executed a written contract wherein Lucy would purchase Zehmer's farm. When Lucy attempted to enforce the contract and purchase the farm, Zehmer stated that he was only joking and never intended to sell the farm. Discuss how the contract employed the objective theory of contracts to determine the outcome of this case.