Let’s consider the chart for a moment. The black line represents the metal of the hook. The hook shape is to demonstrate the distorted way that people who claim to be centrists are actually the far right. So, the “far right” and the “centrists” dot are both directly on the black line.

However, the “far left” dot is in the middle of the eye. In the hook analogy, it’s not on the line. The “far left” is off the hook.