If we don't think the candle in a simulated universe is a "real candle", why do we consider the intelligence in a simulated universe possibly "real intelligence"?
Being a functionalist ( https://en.wikipedia.org/wiki/Functionalism_(philosophy_of_m... ) myself, I don't know the answer on the top of my head.
I can smell a "real" candle, a "real" candle can burn my hand. The term real here is just picking out a conceptual schema where its objects can feature as relata of the same laws, like a causal compatibility class defined by a shared causal scope. But this isn't unique to the question of real vs simulated. There are causal scopes all over the place. Subatomic particles are a scope. I, as a particular collection of atoms, am not causally compatible with individual electrons and neutrons. Different conceptual levels have their own causal scopes and their own laws (derivative of more fundamental laws) that determine how these aggregates behave. Real (as distinct from simulated) just identifies causal scopes that are derivative of our privileged scope.
Consciousness is not like the candle because everyone's consciousness is its own unique causal scope. There are psychological laws that determine how we process and respond to information. But each of our minds are causally isolated from one another. We can only know of each other's consciousness by judging behavior. There's nothing privileged about a biological substrate when it comes to determining "real" consciousness.
I'm not against this conclusion ( https://en.wikipedia.org/wiki/Philosophical_zombie ) but it doesn't seem to be compatible with what most people believe in general.
Determining what is real by judging causal scope is generally successful but it misleads in the case of consciousness.
If I make a button that lights the candle, and another button that puts it off, and I press those buttons, then the virtual candle is causally connected to our physical reality world.
But obviously the candle is still considered virtual.
Maybe a candle is not as illustrative, but let's say we're talking about a very realistic and immersive MMORPG. We directly do stuff in the game, and with the right VR hardware it might even feel real, but we call it a virtual reality anyway. Why? And if there's an AI NPC, we say that the NPC's body is virtual -- but when we talk about the AI's intelligence (which at this point is the only AI we know about -- simulated intelligence in computers) why do we not automatically think of this intelligence as virtual in the same way as a virtual candle or a virtual NPC's body?
Real is about an object having all of the essential properties for that concept. If we take it as essential that candles can burn our hand, then the virtual candle isn't real. But it is not essential to consciousness that it is not virtual.
A candle in Canada can't melt wax in Mexico, and a real candle can't melt simulated wax. If you want to differentiate two things along one axis, you can't just point out differences that may or may not have any effect on that axis. You have to establish a causal link before the differences have any meaning. To my knowledge, intelligence/consciousness/experience doesn't have a causal link with anything.
We know our brains cause consciousness the way we knew in 1500 that being on a boat for too long causes scurvy. Maybe the boat and the ocean matter, or maybe they don't.
A simulation of a tree growing (say) is a lot more like the idea of love than it is... a real tree growing. Making the simulation more accurate changes that not a bit.