Waymo co-CEO Dmitri Dolgov laid out the clearest technical case yet for why cameras alone can’t take a self-driving system to full autonomy, arguing that “weak sensing” hits a safety ceiling long before it reaches superhuman performance. He never said the word Tesla. But camera-only is Tesla’s entire bet, and this was a direct shot at it. The sensor debate, from someone with 220 million driverless miles Dolgov made the comments in a talk at Y Combinator’s Startup School, walking through the less...