Final answer:
The Coronation Cases represent the legal doctrine of 'discharge by frustration of purpose,' which happens when an unforeseen event makes the completion of a contract meaningless or impossible, in line with the fundamental reason the contract was created.
Step-by-step explanation:
The Coronation Cases are examples of discharge by frustration of purpose. This is a legal doctrine where a contract may be discharged, or terminated, when an unforeseen event undermines the fundamental reason for entering into the contract, making the completion of the contract impossible or radically different from what was contemplated by the parties to the contract. These cases often involve situations where the changed circumstances render the performance of the contract meaningless, as was the case with people who rented rooms to view the coronation procession of King Edward VII, which was canceled due to the King's illness.