Try showing it to that strange religious uncle of yours, or the crazy guy who lives under the freeway, or a typical middle school teacher. I suspect there's some insights for some of those people to think about / argue against...
The argument is premised on long standing principals of ordinary language philosophy, i.e. "It's not Ted, because Ted is on holiday," is an appropriate response whereas, "It's not Ted, but a robotic doppelganger," is a bullshit response [a recent addition to the philosophical classification of propositions] in ordinary circumstances.
On top of that, there have also been many cases of believing incorrectly that somebody else is out of town.
Also, it isn't necessary to deal with the edge cases to handle 99% of what most people encounter.