If you've got a bunch of ordered categories, like "bad", "okay" and "good", the category in the middle. (So if humans can have 0, 1 or 2 legs, then 1 would be a

If you've got a bunch of ordered categories, like "bad", "okay" and "good", the category in the middle. (So if humans can have 0, 1 or 2 legs, then 1 would be at the center.)