1. Who is credited with formulating the concept of severance of joint tenancy?
The Legislator or Legal System
Explication
The concept of severance of joint tenancy is primarily a product of legal doctrine developed through statutes and case law. The source discusses the legal framework and statutory provisions that underpin severance, but does not attribute it to a specific individual. Therefore, the most accurate answer is that it is credited to the legislator or the legal system, which has formalized and developed the doctrine.