one more thing before we go. on sunday, apple's ceo, tim cook, delivered stanford's commencement address in palo alto, california, in the heart of silicon valley. cook had a very blunt message for the class of 2019, that the tech giants have failed them by failing to take responsibility for the chaos they've created. >> lately it seems this industry is becoming better known for a less noble innovation, the belief that you can claim credit without accepting responsibility. it feels a bit crazy that anyone should have to say this, but if you built a chaos factory, you can't dodge responsibility for the chaos. if we accept as normal and