Hi Eric - sorry for making assumptions.
>We should even be able to discover whether we in fact exist physically, or
>whether we exist as a simulation inside a big computer.
Yes. How can we tell. What does Tippler say? What does he predict "people" will do when they find out their "real" state? More interestingly, what will the programmers do if they find their virtual subjects go on strike?
Just for a laugh - what happens if you terminate yourself and you are a simulation? Can you? Do they Reboot you? Do you know?
Does this remind you of a recent very funny and deeply anarchic movie named after a recent US president?