"Leafy greens such as romaine lettuce, kale, collards, Swiss chard, and spinach are the most nutrient-dense of all foods."

Previous Quote

A linguist would be shocked to learn that if a set is not closed this does not mean that it is open, or again that "E is dense in E" does not mean the same thing as "E is dense in itself".

— John Edensor Littlewood