In this article, I seek to demonstrate that arguments made by scholars against First Amendment protection for commercial speech may be divided into three categories: (1) rationalist, (2) intuitionist, and (3) ideological. I argue that all three forms of opposition to commercial speech protection suffer, either directly or indirectly, from the same fundamental flaw: each constitutes or at the very least facilitates creation of a constitutionally destructive form of viewpoint discrimination. I show that all of the specific rationales for opposing First Amendment protection for commercial speech are fatally and illogically underinclusive: In each case the justification asserted to support reduced protection for commercial speech logically appl...