The language we want to teach is called vague, because of how little specific it is. This makes people who are looking for meaning to those words. Once this clarification is made, the second is to break old structures that lie in our mind: The phrases do not have to be complete, the words do not have to have the same meaning for everyone.
Lazy language is another way of speaking. It has the peculiarity that avoids or dodges people's resistance. However it has limits. I have always said it: It cannot go against the values of a person.
The author is trying to make the readers comprehend the types of food we have by describing them and expounding on how effective or good the types of foods are for the brain by their description.
