I believe his answer in the QA was that you would launch an empty rocket first, and once that rocket is fueled, a 2nd rocket with passengers would launch and tr

I believe his answer in the QA was that you would launch an empty rocket first, and once that rocket is fueled, a 2nd rocket with passengers would launch and transfer to the fueled rocket, and then the new passenger-empty rocket would be in orbit to be fueled for the next trip.