Doctor and Student explores the relationship between the common law and equity and distinguishes a number of sources of legal principles.
First, according to Hanson, Doctor and Student establishes a typology of law, identifying its "types and sources".
[10] Schoek argues that St. Germain, in Doctor and Student, "was doing nothing less than challenging the traditional system of canon law".
[11] This is evidently due in part to the radical conclusion of the work: according to Hanson, the book advances a legal theory that "subordinate[s] all law to regal authority".
[12] Sale suggests that the work involves a "challenge" by the eponymous doctor and student to the common law "from the perspective of conscience".
[13] Thomas More, in Apology and The Debellation of Salem and Bizance, responded negatively to Doctor and Student.