When people disagree on whether one chart design is better or worse than another, they often have quite different assumptions about what “better” actually means when it comes to charts. Depending on the person, “better” could variously mean more precise, more creative, more familiar, faster to visually process, more inspiring, more neutral, more versatile, more memorable, or any one of several other quite distinct definitions. Agreeing on a common definition of “better” will allow the data viz field to move past some longstanding controversies and make it much easier for novices to learn how to create truly useful charts.