Question

The process of deciding a court case based on the basis of previous decisions in the principle

Answer 1

The answer is "precedent" or "common law". 

Answer 2

Answer:

Precedent

Explanation:

A precedent is the judicial decision taken in the light of a specific case, whose normative element may serve as a guideline for the subsequent prosecution of analogous cases. In other words, it is the process of deciding a court case based on previous decisions.  Judicial precedent, as it were, is a single decision, but a paradigmatic decision, which will guide other judicial decisions in identical or essentially similar cases.