A Rememberer once told me that in cycles past men built machines to do their thinking for them, although these machines were hellishly expensive and required vast amounts of space and drank power like gluttons. That was not the worst of our forefathers' follies; but why build artificial brains when death each day liberates scores of splendid natural ones to hook into the memory tanks? Was it that they lacked the knowledge to use them? I find that hard to believe.
-- Robert Silverberg, "Nightwings", in Eleventh Galaxy Reader, 77-8.