> Would answering the question of whether we're in a simulation have any impact on your behavior, thoughts, and actions? Probably not. So what does it matter?
It would matter a lot, surely.
Being in a simulation, implies that some conscious entity is running the simulation and has constructed it.
Therefore, the motivations and reason of that being running the simulation are immediately important.
Perhaps a twisted posthuman sect is running an ancestor simulation of all humans to have existed to "test" them in various moral situations and then judge them or punish them as appropriate? That could be hugely important for how you choose to live your life.
Even if you don't know why a simulation is being run, but only know that you are in one, it raises a lot of troubling questions because the simulation runner must have some motivation. I bet it would lead people to live differently.
The universe would go from being fundamentally amoral to having an effectively omnipotent entity in "charge" of it - a massive change that would surely influence how people view things and act.