Elon Musk contradicted a bold claim he made last year about Tesla's self-driving capabilities (TSLA)

· Last February, Tesla CEO Elon Musk said he was "certain" the electric-car maker's vehicles would be able to drive without human assistance by the end of 2019.
· On Wednesday, Musk said Tesla "got pretty close" to meeting his goal and could be a few months away from achieving it.
· But he suggested that some of Autopilot's...