Most of us hang up on robots too though. Robocalls are a nightmare. The best argument against Duplex IMO is that it’s going to enable a new generation of hellish scams and robocalls, if it ever leaves Google. Presumably Google knows this and will keep the tech locked down. Still, it’s only going to be a matter of time before it’s open one way or another, and then we’ll have to have the “should I be told up from that it’s a robot?” conversation again.