The supplements and their integration into the second edition were a great improvement to the "OED" as a whole, but it was recognized that most of the entries were still fundamentally unaltered from the first edition. Much of the information in the dictionary published in 1989 was already decades out of date, though the supplements had made good progress towards incorporating new vocabulary. Yet many definitions contained disproven scientific theories, outdated historical information, and moral values that were no longer widely accepted. Furthermore, the supplements had failed to recognize many words in the existing volumes as obsolete by the time of the second edition's publication, meaning that thousands of words were marked as current despite no recent evidence of their use.