The last time this subject was explored here was initiated by Amos. The subject has now moved from being philosophical to actual physics. In fact the neural net of AI, which resembles humans, that was developed by a team under Geoff Hinton, won the physics Nobel Prize this year. If you want to learn how this neural net was discovered, you can listen to Hinton here, https://www.youtube.com/watch?v=jrK3PsD3APk
What I noticed is the truth that much of our consciousness we accomplish without our awareness or direct control. We can be conscious even in our dreams. A person may not be aware of a post-hypnotic suggestion but obey it nonetheless. Indeed, a machine can have consciousness. A physicists view