Isn't this impossible by definition? Nothing can be more convincingly human than humans, or else it would be something else.

Perhaps you mean mimic charismatic or intelligent humans more than most, or the average, human?

> Once you have a machine that can automate and mimic social, political, cultural, and personal interactions, that's it - that's the political singularity.

Do you mean online only? Because I imagine we're still quite a ways from physical machines convincingly mimicking humans IRL.

> And that's true even the machine isn't completely reliable and bug free.

If the machine makes inhuman mistakes the humans will likely notice and adapt.