A person reads the list as a ledger: the year in the margin, the titles down the page, the kind at the edge. The eye goes row by row, and each row is read where it stands.
A second reader reads the very same list, by itself. It steps down the rows and asks three plain things of it, to find, to read and to relate, and each question lights the rows that answer it.
Change an entry once, at the source, and both readers show it at the same moment. There is one list and not two copies, so there is nothing to keep in step.