human
As a matter of fact, people without the first necessary qualifications, or any aptitude whatever for the work are set to compile indexes, and the work is regarded as nothing more than purely mechanical copying that any hack may do. So long as indexing and cataloguing are treated with contempt rather than as arts not to be acquired in a day, or perhaps a year, and so long as authors and their readers are indifferent to good work, will worthless indexing continue.