This can be such computer program which could scan text and than check the correctness of words, style of writing, grammar. The main specialty that would differ it form word processor would be the ability to provide the analysis of origin and effect connections, and to classify the text by the user preferences.
This device could make easy life of different censors that have to read tones literature. Also it will be in requisition among writers, reporters, libraries, journalists and other people who work with the great quantity of printed information.
Of course it will be the only machine and it couldn't change humane mind but with time it will be improved and at last I think it will be used instead of all the crafts noted above.
People will get freedom from boring routine and will do work that is interesting to them. But I suspect that some men who invent self writing machine will appear and it will be the end.
People will stop thinking in such case, imagine yourself this chain.