Let Me Tell Ya About Long Term Memory

Long term memory is big:

Shepard (1967) had subjects study 580 arbitrary words. On a forced choice test they scored at just under 88%

Long term memory is flexible and robust:

if asked to name situation comedy programs, most people will have no problem
a database system might store a set of records such as {(Giligan's Island, situation comedy), (Full House, situation comedy), (World News, current affairs), etc.}
at test the database could cycle through these one at a time retrieving those that have the situation comedy tag
however, such a system would require that when you are watching television shows you are constantly tagging them as situation comedy, current affairs etc.
if you had tagged the program as "the funny show with the skinny sailor in it" the search for situation comedy would come back with NO RECORDS FOUND.
human memory is much more flexible and robust