What are the two major types of rules in application logic?

The correct answer highlights the distinction between business rules and GOSU rules. Business rules are essential in defining the policies, practices, and procedures that dictate how an organization operates and ensures all functionalities align with business objectives. They ensure that the application's processes adhere to the company's established guidelines, helping maintain consistency and enforce logical workflows.

GOSU rules refer to the programming and scripting logic that governs how the application performs specific tasks or calculations. GOSU is a Java-like programming language used in Guidewire that allows for the development of complex functional logic to support the business rules. By utilizing GOSU, developers can implement the intricate functionalities that business rules require, providing a bridge between high-level business objectives and the technical execution of those objectives within the application.

In contrast, while validation rules and operational rules each play significant roles in application logic, they don't encompass the broader definitions and functionalities represented by business and GOSU rules. Validation rules primarily focus on ensuring data integrity and correctness, while operational rules guide daily operational practices but do not capture the entire scope of business strategy and application logic as effectively as the combination of business and GOSU rules does.