This book concludes a project on Frege's sense, reference, and modes of representation. It critiques the Naïve Conception of Communication, arguing successful understanding requires Knowledge of Reference, not sharing identical Thoughts. The work introduces Formal Relationism to address Frege's Puzzle regarding belief contents. A core argument asserts that philosophical debates, such as the Substitution Argument and Kripke's critique of descriptivism, must avoid reliance on appeals to "intuition."