Free will and desires is highly debatable, because it ignores external influences like culture and conformity, the effect some chemicals can have on decisions eg pheromones and food, and the effect of things like bacteria or viruses, rabies being one most should be aware of, covid being another.
Where others have suggested Turin and the conversation where the identity is masked, I'm reminded I cant have a conversation with my dog, despite my one sided attempts and I'm sure there is consciousness there.
Trying to define consciousness is very difficult because I could say consciousness is the ability to adapt to ones environment, yet I know there are humans that cant adapt to a change in their environment and there are bacteria than can, yet we define humans as conscious and bacteria as not.
Some people could class chat-gpt as like a human consciousness but I find some of its answers less accurate and more chatty than I would get from Kim Peek of the film Rain Man.
So should the definition of consciousness be restricted to those that have an inner monologue with themselves?
https://www.reddit.com/r/autism/comments/z5bi5p/some_people_...
In other words there are literally people walking about with nothing in their head!
Its so difficult to define consciousness because there are always exceptions seen in other humans, even people hooked up to life support machines in hospital with no ability to communicate with the outside world, and this bit is important, in the same time frame as the communicator. I say that, because people hooked up on life support in coma's of sorts (induced or otherwise), might be experiencing time on a different timescale. You see this delayed mental processing with people on drugs like alcohol or spice zombies or people doing hallucinogens.
So when you see a medical expert claiming someone is not responding when in a coma, are they monitoring them for things like delayed responses which only a cctv and some basic AI monitoring the patient could detect because the medical expert doesn't have the patience with the patient?