I don't know of a human-independent definition of consciousness, do you?
Integrated Information Theory is one attempt at a definition. I read about it a little, but not enough to determine if it is completely crazy.
IIT is provides a mathematical approach to measuring consciousness. It is not crazy, and has a significant number of good papers on the topic. It is human-independent
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.