Natural unemployment, or the natural rate of unemployment, is the minimum unemployment rate resulting from real, or voluntary, economic forces. Natural unemployment reflects the number of people that are unemployed due to the structure of the labor force such as those replaced by technology or those who lack certain skills to gain employment.
Esmeralda's promise is not enforceable because society does not want gifts cheapened by making them legally enforceable because society does not want gifts cheapened by making them legally enforceable.
A legally enforceable contract means that you can keep the promise of the other party. If the other party fails or refuses to meet its obligations, the contract can be fulfilled in accordance with the law.
A non-enforceable contract or transaction is valid but not enforced by the court. Unenforceable is typically used in conflict with void (or void ab initio) and voidable. If the parties implement the agreement, it is valid, otherwise, the court will not enforce them.
