Answer:
Promissory estoppel
Explanation:
Promissory estoppel means that in legal tenet that a promise or pledge can be enforced by law, actually if formulated without legal consideration, if the George now the (promisor) has made a pledge to a Susy the (promises) who then depends on that promise for a subsequent detriment. So what Promissory estoppel is expected to do is to stop the (George) promisor from insisting that an underlying promise should not be legally authorized or implemented. So Susy can sue George on the basis of promissory estoppel and get a reward for George's disappointment