[tjradcliffe]

> A simulation wouldn't need to simulate the entire universe, just what I am observing at that exact moment.

How do you know this? I've run a lot of simulations, and to get things exactly right anywhere you need to compute everything everywhere. That at least is my experience.

You've simply asserted that that is not the case, doing precisely what I'm critiquing the original argument for: imagining a case where there's no problem, and then asserting that case as a matter of fact.

As to Cartesian skepticism, it isn't even a self-consistent position: you want me to take your argument seriously while simultaneously asserting that I don't even know you exist.