And that graph has no data? Confounding is the issue though Ollie, isn’t it? Is associated with is full of confounding. How does carnivore work then? (I added to the post btw after you’d seen it)That is a great graph.
But the article I linked examined actual data involving measurements taken from individuals- primary research. You just have two lines on a page and no way of knowing if they are interlinked or not and what confounding factors may be present.