Last month, General Motors added its name to the growing list of automakers who are pursuing a novel type of partially automated technology called “eyes-off driving.” What they didn’t do, though, is provide a thorough description of how they’ll take responsibility when something goes wrong. Not to be confused with the type of “eyes-off” distracted driving that many drivers seem to be practicing these days , GM’s system would be a step toward the automaker’s ultimate goal of selling privately