<P> A promise is a commitment by someone to do or not do something . As a noun promise means a declaration assuring that one will or will not do something . As a verb it means to commit oneself by a promise to do or give . It can also mean a capacity for good, similar to a value that is to be realized in the near future . </P> <P> In the law of contract, an exchange of promises is usually held to be legally enforceable, according to the Latin maxim pacta sunt servanda . </P> <P> There are many types of promises . There are solemn promises, such as marriage vows or military oaths . There are legal contracts, enforceable by law . Or, there are fairy tale promises, regrettable and problematic at the time they must be honored . And lastly, there are election promises, commitments that most people realize will later be shaped by politics and compromise . </P>

A promise in exchange for a promise is an example of