From: Visual-Syntactic Text Formatting: Theoretical Basis and Empirical Evidence for Impact on Human Reading:

Visual-Syntactic Text Formatting (VSTF) algorithms first analyze, then reformat a sentence into cascading patterns that cue syntactic structure and assist visual- processing. A wide range of neurocognitive, linguistic, and psychological research affirms that an important dimension for the representation of meaning in natural spoken language is syntax.

However, syntax is more complex than a simple, concatenated sequence of one phrase after another; rather, it is hierarchical, much like a set of Russian dolls,in which smaller dolls, or phrase- groups, are “nested” inside ever-larger ones. The human mind’s capacity to build sentences through the recursive process of nesting language units inside other units, and thereby transforming them, is the essential feature that enables human language to represent an infinite number of meanings