"Achieving the initial 80 percent is relatively straightforward since it involves approximating a large amount of human data, Marcus said, but the final 20 percent is extremely challenging. In fact, Marcus thinks that last 20 percent might be the hardest thing of all." 100% completely accurate is super-AI-complete. No human can meet that goal either. No, not even you, dear person reading this. You are wrong about som…
The thing is that truth/reality is not a thing that is resolvable. Not even the scientific method has this sort of expectation!
You can imagine getting close to those percentages, with regards to consensus opinion. That's just a question of educating people to respond appropriately.