True or False: West's Key Number System and the Lexis Legal Topic Digest are the only available classification systems for cases.

The assertion is false because there are multiple classification systems available for cases beyond just West's Key Number System and the Lexis Legal Topic Digest. While these two systems are among the most widely utilized and recognized tools for legal research, there are other classification methods that legal professionals and researchers may employ.

For example, various jurisdictions may have their own localized systems for categorizing cases, and certain legal publications or databases might introduce unique organizational structures. Additionally, legal treatises and scholarly articles often outline their own frameworks for classifying legal issues and case law. The diversity in classification systems reflects the complexity of legal research and the need for different approaches to tackle various areas of law. Therefore, the correct answer highlights the existence of alternative classification systems in legal research.