Why is the objective manifestation rule used to argue the enforceability of a promise?

The objective manifestation rule is used to determine the enforceability of a promise by focusing on how a reasonable person would interpret the actions and Words of the parties involved, rather than their subjective intentions. This approach ensures that agreements are evaluated based on observable behavior and communications, fostering reliability and predictability in contractual relationships. By emphasizing objective evidence, it helps prevent disputes arising from hidden intentions or misunderstandings, thus promoting fairness in enforcing promises.