Algorithms can be constructed to generate natural language statements of any knowledge that has been represented by labeled digraphs. Labeled digraphs can be efficiently represented in a digital computer. One way is with relational databases where each directed vector of the graph is a row in a table. I have choose to rename the objects Node, Arrow, Destination node with the attributes Subject Verb Object respectively , and name this knowledge representation scheme SVO . An apple is a fruit.
Fruits are sweet.
Rather it is proposing that graphical diagrams can be used by humans to picture in our minds the underlying deep semantic relationships that are inherent in language and knowledge. Then without loss of precision, these deep semantic relationships can be coded inside a computer where artificial agents can have access to them.