52 - Structure Building Framework lays out the mental processes used to understand and create meaning out of text. You do this through creating mental structures out of the information you are studying. When done properly, through rule learning, you are taking the most salient points from a text and relating them to each other with hierarchies and webs of knowledge, while ignoring the irrelevant details.
For example, if you think of a medieval society, their exists vertical relationships(king and his subjects) and horizontal ones(different guilds operating in a town).
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