I think all of their uses of “mathematical” just means bounding box. It’s pretty reasonable because those are the numbers design software shows you for placemen

I think all of their uses of “mathematical” just means bounding box. It’s pretty reasonable because those are the numbers design software shows you for placement and uses to make guides. And you can calculate a centroid, but what about when the image has multiple colors, making one side look heavier than the other, or any other weird case? This isn’t rejecting math, just in this case it’s more effective to go with what looks right versus follow a formula. You don’t use a slide rule to catch a baseball.