CHAPTER Homework Bill pledged s20,000 to his favorite chary for the purpose of acquiring anew bus. charity then contracted with a dealer to purchase the bus, but Bili foll on hard times and refused to meet his commitment. a. The doctrine of promissory estoppel could be applied these facts. b. This is an example of past consideration, thus Bars commitment could not be e. This is an example of an illusory promise, thus Bill's commitment could nee be it, in fact, a new bus was required by d. This is a binding requirement