This document discusses rules of inference used in propositional logic and quantified statements. It defines rules like modus ponens, modus tollens, and universal instantiation that allow valid logical arguments to be constructed by moving from premises to a conclusion. An example argument is broken down step-by-step to demonstrate applying rules of inference like simplification, modus tollens, and modus ponens to derive a conclusion from a set of premises. Finally, inference rules for quantified statements including universal and existential generalization and instantiation are introduced.