Let's break it down. The first part, Visual, is what you see when you look at something, color, arrangement, font, etc... The rhetoric part deals with the persuasion. In conclusion, it's what we see and how we act or think when we see it. It is one's ability to understand what an image is attempting to communicate.
But additional legal, personal, ideological, and political influences weigh on the Supreme Court and its decision-making process. On the legal side, courts, including the Supreme Court, cannot make a ruling unless they have a case before them, and even with a case, courts must rule on its facts.