Contract interpretation and the parol evidence rule are crucial aspects of contract law. These concepts help determine the meaning of contract terms and govern the admissibility of external evidence in disputes. Understanding these principles is essential for resolving contractual ambiguities and enforcing agreements as intended. Courts use various techniques to interpret contracts, including examining plain language and applying canons of construction. The parol evidence rule generally bars external evidence that contradicts or adds to a complete written agreement, with some exceptions. Mastering these concepts is key to navigating contract disputes effectively.