"A system of organization, whatever its parameters, should render case-by-case choices obsolete: A book either is or is not a true-crime thriller, does or does not contain fiction, was or was not written by Agatha Christie. But in practice, every organizational schema is a doomed attempt to blanket chaos with order, and only more so the grander its ambitions. It may be possible to draw a sensible line delineating science from nature, art from design, autobiography from memoir, or war history from American history from Native American history, but to do so is to suggest that any one exists independently from the other. The clear lines bleed and become wobbly."
More at LitHub