One should note that the top-down – bottom-up axis is characterized by the extent of the writer/speaker imposing a specific mindset. In the authoritative (top-down) sphere more definite language is used, and it is imperative.
The democratic (bottom-up) sphere, on the other hand, is contemplative; one can explore the various viewpoints much more freely and even reflect one’s own thinking in the discourse.
We can notice that the dimensions are not only about characterizing the various pieces of discourse but also what is expected in their genre. A political speech cannot be thoughtful and consider various viewpoints, a corporate blog can’t include funny stories from last week’s meeting and agitative essay in a personal blog creates a sense of aversion. From an authoritative piece certainty is expected, and in a democratic one it is rejected by the audience.