Answer: win because Bill had a legal right to drink alcohol.
Explanation: Bill is twenty-five years which is above the alcohol consumption age. However, if Bill uncle now refuses to pay Bill as agreed. The uncle claims that because Bill suffered no detriment by refraining from alcohol, and that because his non-drinking did not constitute consideration, no contract was formed. If Bill sues his uncle, Bill will win because Bill had a legal right to drink alcohol at that age.