Say, let’s admit consciousness is the result of a physical process.
Then say this process only goes “forward” when our time coordinate increases. Just like an egg gets cooked when it’s temperature coordinate increases, but it doesn’t get more or less cooked when it’s temperature coordinate decreases.
This would mean that going back in time doesn’t result in any perceptible change, since your consciousness hasn’t evolved from it’s “former” state.
Thus making it possible for us to be travelling through plenty of dimensions in varied directions, only ever experiencing the brief times when you happen to be moving in increasing time. Or whatever combination of movement along varied dimensions makes it possible for you to be conscious.
TLDR: i need to take shorter showers
This is not unique to the science of consciousness. Extreme scepticism can kill any science from the get-go. Sure, we can’t prove that other beings are conscious. But we also can’t prove that the external world exists, either. Does that mean we’re doing to stop doing physics? No, because some forms of extreme scepticism are simply unreasonable. If we wait around for solutions to these radical sceptical scenarios then we’re never going to get anywhere.