This document summarizes a presentation about using reactive logic to handle domain-specific business logic. Reactive logic uses spreadsheet-like expressions to define validations and computations across multiple database tables. This approach is more concise and executable than traditional coding, scaling effectively to handle complex enterprise problems like payment allocation and price rollups through a few simple rules. The reactive logic approach claims to provide faster development and greater agility than traditional coding for business logic, which typically requires a significant amount of code.