Why is past consideration not a consideration in a present promise?

Question

Quizplus · Accepted Answer

Past consideration refers to an act or service that has already been performed and cannot be used as consideration for a present promise. This is because consideration must be something of value offered in exchange for the promise in the present moment. Past consideration does not meet this requirement as it is not related to the present exchange. Therefore, it cannot be a consideration in a present promise.

Why Is Past Consideration Not a Consideration in a Present