I assume by "physical brain" here you mean one made of protoplasm.
What does contemplating the possibility that you aren't running on such a brain now do to your confidence?
Yes, I meant protoplasm.
If I knew that I am currently running on a silicon chip (Gunm-style), then I would be highly confident that replacing that chip by another, identical one, preserves my identity, because it's the same configuration. Moreover, replacing my old chip by a newer one, before the physical deterioration significantly affects the actual software processing, probably would work as well.
But if we're talking about running my software on a different chip through, say, a virtual machine that emulate my original chip, then I would be less confiden...
From Being a Realist (even if you believe in God):
My mother, who doesn't call herself a theist (I think she's agnostic), doesn't even accept realism. She doesn't even agree with this:
That's little more than tautologies here. Yet it elicited an impression of being forced to believe. I know because she told me about the totalitarian dangers from such narrow thinking.
I'm happy to have finally found the root cause of our ongoing disagreement, but now, how can I deal with that? It looks pretty hopeless, but just in case, does someone have a suggestion, or should I just leave it at that? (My ego doesn't like it, but giving up is an option.)
Now I'm relieved to know that in near mode, she's a complete realist. This craziness only shows up in far mode.