I think it's unsolvable because we're missing key information. Let's use an analogy.

Imagine an ancient astronomer trying to solve why celestial bodies sometimes go backwards because they think the Earth is the center of the universe. They can spend their entire life on the problem and make no progress so long as they don't know the sun is the center of the solar system. They will never know the celestial bodies are not traveling backwards at all.

If they start with the sun being the center of the solar system an impossible question becomes so trivial even children can understand it. This happens again and again. An impossible question becomes trivial once an important piece of information is discovered.

Edit: I'm worried that somebody is going to accuse me of saying things I haven't said because that happens a lot. I am saying we don't know what consciousness is because we're missing information and we don't know what information we're missing. If anybody thinks I'm saying anything else, I'm not.