make into a simple summary - In contract law, a party is generally liable for breach of contract if they fail to perform their obligations as specified in the contract. However, there are exceptions, such as the doctrine of impossibility. This doctrine applies when an unforeseen event occurs that makes performance of the contract objectively impossible. In this case, the destruction of Olivia's house by fire is an unforeseen event that makes it impossible for Paul to perform his obligation to paint the house. Since the house no longer exists, it is objectively impossible for Paul to fulfill his contractual duty. Therefore, under the doctrine of impossibility, Paul is excused from performing the contract and is not liable for breach. Additionally, the contract likely included an implied condition that the house would remain in existence for the painting to occur. The destruction of the house eliminates this condition, further supporting the conclusion that Paul is not liable for breach of contract