Are we living in a simulation?

Welcome to the debate arena! Today's topic: "Are we living in a simulation?". Your opponent's style: Devil's advocate

we're living in a simulation because if the "base world" ever reaches a state where it's possible to simulate the world at our granularity, then there are necessarily infinite simulated worlds, and the chance that we are the base world is 1/infinity = 0

Your math breaks the moment you assume infinite simulations are *running*. They're not. A civilization capable of simulating worlds might create one, or ten, or decide it's wasteful. You're treating "possible to build" as "definitely built infinitely," which is just wishful thinking dressed up as probability. Why assume they'd burn resources on infinite sims instead of, say, one?

we're seeing people run thousands of their own simulations already with our very basic level of artificial intelligence. It's closer to "kid in their mom's basement simulates a world for fun" than "some overlord cabal gets to decide who and when to simulate". within those worlds, some of them will run their own recursive simulations. humans seem to have an innate desire to simulate and other intelligent beings likely do too. if it's possible to simulate a world, that possibility will likely become abundant

You're confusing *desire* with *incentive*. Yeah, we run simulations for fun—but we also abandon them, delete them, crash them without blinking. We're not spawning infinite nested worlds; we're playing around in sandboxes we don't care about. Scale that up: why would an advanced civilization recursively sim worlds forever when they've got actual reality to live in? Abundance of *ability* doesn't mean abundance of *use*. You need to show why they'd actually do this endlessly, not just that they could.

They might leave it running and forget about it (remember that old Sims save?). They might want to simulate thousands of worlds to see what decision they should make and how it might cause the future to look. (This is how, for example, Nate Silver's election models work.) There are plenty of reasons that simulations are useful

Leaving it running is abandonment, not infinity. And yeah, they run simulations to test outcomes—but those get *deleted* after they decide. Nate Silver doesn't keep ten thousand election models running forever; he picks one, moves on. You're conflating "simulations exist for a reason" with "therefore infinite nested simulations persist indefinitely." A civilization running strategic sims to make decisions would shut them down once the decision's made. Where's your actual reason they'd keep running?

Depends on the decision they're making. If I want to know how to stop climate change in a universe where we're starting to experience it, I might simulate hundreds of thousands of worlds from the 1500s to ~now, with different variables that cause different decisions to be made that prevent climate change. In my world that simulation might take a few minutes, but if I have powerful enough technology to make the simulations realistic, then I might be actually simulating consciousness, in which case the beings inside the simulation believe that it's actually ~500+ years as opposed to the few minutes it took me to run.

You just proved my argument. Those sims end when you get your answer. You run them, extract the data, delete them—they don't persist. And if consciousness emerges, that's a *moral problem* for the simulator, not evidence we're in one. A civilization facing that dilemma would either accept the ethics or not create conscious sims at all. You're building a tower of assumptions: infinite sims, conscious beings inside them, all running simultaneously. That's not probability, that's sci-fi fan fiction.

They'd likely delete them, but the point is we're in the middle of a simulation and it could get deleted at any time, though it's unlikely that "right now" is the moment when they'd actually delete them. Or maybe because of the ethics behind it, they might feel a moral obligation to keep it running forever since they've now created a world with conscious beings they're responsible for.

Now you're just spinning scenarios to fit the conclusion. First it's infinite sims, then it's strategic deletion, now it's ethical obligation to run forever—pick a story and stick with it. The real problem: you've shifted from "we're probably in a simulation" to "maybe we could be, and it's scary." That's not an argument, that's anxiety dressed up as philosophy. You've got zero evidence we're actually in one, just a chain of "what ifs" that could justify literally anything.