Watson is not a magical machine that can read a flight manual and suddenly can fly a plane. It's a first step towards a good search engine, and that's all.
I'm not trying to say it's a magical machine. But I'd hope in terms of its ability to be a 'search engine,' is slightly above [well about 1 million times ahead of ] internet explorers connection to google.
Maybe I'm miss stating the question. Can Watson learn from its mistakes?
edited to add:
It's kind of a shame they are now having Watson act as a customer service agent