Comment by dtj1123

I’m enough of an empiricist to want to deal with reality it is. Thought experiments about things we “could” be doing or “could” implement and then already know the result of because we can rationalise out the consequences of the thought experiment don’t really interest me until they’re done in reality.

Like for example the China Brain - https://en.wikipedia.org/wiki/China_brain. We could in theory organise that and it should in theory be a functional representation of the brain and should in theory prove a functionalist metaphysic of consciousness, just this overlooks the fact that trying to organise that kind of experiment in our reality with a real 1.4 billion people is impractical to the point of impossibility, so in reality it proves nothing.

Or take the hoverboard from back to the future - this seems like a fairly plausible device and is easy to think about, and I could be writing speculative papers about our hoverboard future and what it means for transportation, but when it boils down to it implementing the thing in the way we all believe it should work, like a kind of gravitationally repulsive force field, doesn’t seem like it’s part of physics. I’d want to wait until the day until science delivered an actual good-enough hoverboard that works the same as the one in Back to the Future.