Not exactly right either. Before its displayed to some approximation in some RGB array, it was some back buffer. That back buffer could have been attempting t

Not exactly right either. Before its displayed to some approximation in some RGB array, it was some back buffer. That back buffer could have been attempting to render an infinitely small, crisp line or a line almost two pixels wide. The point is that kind of information is not encoded in the buffer. Its just a point sample of the output of the previous stage in the pipeline.