The headline, and conclusion of the article, feel incomplete. A complete line would read "IBM Watson Reportedly Recommended 'Unsafe and Incorrect' Cancer Treatments At A Rate X% Higher Than Doctors." Doctors make mistake. Machine-based intelligences will make mistakes too. If you throw out a system that errs in 1 in every 100,000 cases so that you can stick with a system that errs in 1 in every 250 cases, you're not going to get anywhere.