This document proposes a modal logic called NL that can analyze common language sentences while avoiding paradoxes. NL refines the law of excluded middle so it only applies when a sentence is not self-contradictory. This allows sentences like "this statement is false" to be considered false without violating classical logic. NL also includes new axioms like Then-4 that allow for paradox-causing sentences to be deemed false. The goal is for NL to have many of the useful properties of classical logic while properly handling paradoxes in natural language.